Math, asked by santoshpatel87907, 4 months ago

sin²63 + sin²67
Cos²17+ Cos²73​

Answers

Answered by mahawirsingh15
2

Answer:

sin² 63° + sin² 27°

cos² 17° + cos² 73°

=

sin² 63° + sin² (90° - 63°)

cos² 17° + cos² (90° - 17°)

=

sin² 63° + cos² 63°

cos² 17° + sin² 17°

= 1

∵ sin(90° - θ) = cosθ;

cos(90° - θ) = sinθ;

sin²θ + cos² θ = 1

please mark as barinlist

Similar questions