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任意角三角函数的概念

> 已知在△ABC中，∠A，∠B，∠C所对的边分别为a，b，c，若 cosA cosB = b a 且sinC=cosA （Ⅰ）求角A、B、C的大小；（Ⅱ）设函数 f(x)=sin(2x+A)+cos(2x- C 2 )，求函数f（x）的单调递增区间，并指出它相邻两对称轴间的距离．

问题：

发布时间：2024-09-08

已知在△ABC中，∠A，∠B，∠C所对的边分别为a，b，c，若

cosA

cosB

=

b

a

且sinC=cosA
（Ⅰ）求角A、B、C的大小；
（Ⅱ）设函数 f(x)=sin(2x+A)+cos(2x-

C

2

)，求函数f（x）的单调递增区间，并指出它相邻两对称轴间的距离．

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已知在△ABC中，∠A，∠B，∠C所对的边分别为a，b，c，若 cosA cosB = b a 且sinC=cosA （Ⅰ）求角A、B、C的大小； （Ⅱ）设函数 f(x)=sin(2x+A)+cos(2x- C 2 )，求函数f（x）的单调递增区间，并指出它相邻两对称轴间的距离．

可能感兴趣的题目：

已知在△ABC中，∠A，∠B，∠C所对的边分别为a，b，c，若

cosA

cosB

=

b

a

且sinC=cosA
（Ⅰ）求角A、B、C的大小；
（Ⅱ）设函数 f(x)=sin(2x+A)+cos(2x-

C

2

)，求函数f（x）的单调递增区间，并指出它相邻两对称轴间的距离．