Question

Evaluate:
sin' 22° + sin 68°
20 coo+sin 63° + cos 63 sin 27°​

Answer 1

Sin² 22+sin² 68/cos² 22+cos² 68+sin² 63+sin² 27

sin²22+ cos²22/sin²68+cos² 68+sin²63+sin²27

=1/1+1

=2

so in this question you have two know

sinA =cos (90-A)

cosA=sin (90-A)

sin^2 A+cos^2 A=1