![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a892dbcef7934d97016bb190d94e0bc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 已知正(余)弦求余(正)弦解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba564f8149fb98ee50c4012f06708382.png)
A.-![]() | B.![]() | C.±![]() | D.±![]() |
【知识点】 已知正(余)弦求余(正)弦解读 已知弦(切)求切(弦)解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef966cdd137b3b10e290201b4d17542e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 已知弦(切)求切(弦)解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b818e1793be8d9213e903e5224987a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4b363797455e171e5dff9193eb28cc9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 已知弦(切)求切(弦)解读 已知直线垂直求参数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6361ceaa9240fb7b971d62a1fedf6365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779bbd3c6d82c38c0cdc345a344fe44a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 利用定义求某角的三角函数值解读 正、余弦齐次式的计算解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8db555926603fef963b1aa0e9111e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e7cc447d6c79e2c4622a1783af1d50d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 正、余弦齐次式的计算解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce47439b3c7493cbd01aaf79ecc48907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d469f6556c10a448446ef4ef59065bc4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 sinα±cosα和sinα·cosα的关系解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f205dd168556a387492aab1fcda939c9.png)
A.-1 | B.0 |
C.1 | D.2 |
【知识点】 由条件等式求正、余弦解读 已知弦(切)求切(弦)解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2de12bbd5097debc83d6a46364589748.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 已知正(余)弦求余(正)弦解读 已知弦(切)求切(弦)解读
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 由条件等式求正、余弦解读 已知弦(切)求切(弦)解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69b4cab645c97f6d1710f803ef6a8436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338457322c0cde3896ce23a7e724acca.png)
A.![]() | B.![]() | C.![]() | D.![]() |
【知识点】 sinα±cosα和sinα·cosα的关系解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef001eeef468ca21ac0cbb23fd135657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c296cfd965f911226701f966a8fc807.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb616b9843cc67f5def0fbfc7ec863ce.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc8ef902dc3481ae24d888f57466154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c90b13f37fcd989341c7bc983024037.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
E.![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc657754f7679fe0aa7a73fbd687a2d7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c51b2776876572fb50b74ecab736b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec34e09aa0fe9fafb42bcebc50d06bf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f05d8a012b9732d47662792182edd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caec026485ec944a755c81cc168c8579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf70e7b6b397e95a0bf308f717a3ab09.png)
【知识点】 三角函数的化简、求值——同角三角函数基本关系解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1ab3f56f5c2dd3537098e97b9f02e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ff9495d19d4f132d8a07c4a2f6a617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c87874458fabe50aff5e19d586d5d94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26e3da6658f0630339be870036ea0b7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69dd37c1a902b95b7bc61d1d9fd8e1e.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cebe06d0c9ffa4bdd7ed79dfbe1b19fe.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca3d036a941345c5cc407b910255ef4b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64800a178eba0e2ebd60efb085b9484.png)
【知识点】 正、余弦齐次式的计算解读
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bfc9a414c71554f9b41f98238be6ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78da1535bb82994c4c2e48a427418748.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26167317b121cd2428bd35ea99f75422.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)方程的两根及此时
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca634949580c1adf9f56fa9c9c926bc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c5a05a11f731194a845e68a0479ce4.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9840854a247ca4c242a0d6f0c922ed4a.png)