Giải phương trình đẳng cấp bậc hai đối với sinx, cosx
a) 2.sin²x +sin2x =2
b) cos²x -si...
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Mathematics, 01.09.2021 15:40 loraross77
Giải phương trình đẳng cấp bậc hai đối với sinx, cosx
a) 2.sin²x +sin2x =2
b) cos²x -sin²x - 2√3 .sinx. cosx =1
c) √3. sin²x+ (1-√3).sinx. cosx- cos²x + 1 - √3 =0
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