cos2acos2b + sin^2(a+b) - sin^2(a+b) = cos (2a+2b)
Answers
Answered by
0
Step-by-step explanation:
sin27
∘
sin63
∘
−cos63
∘
cos27
∘
=sin(90−63)
∘
sin63
∘
−cos63
∘
cos(90−63)
∘
cos63
∘
sin63
∘
−cos63
∘
sin63
∘
=0
Similar questions