Question

sin22° + sin68°
cos22° + cos268°
+ sin263° + cos 63° sin 27°
15.​

Answer 1

Answer:

sin^2 22+sin^2 68/cos^2 22+cos^2 68+sin^2 63+sin^2 27

sin^2 22+ cos^2 22/sin^2 68+cos^2 68+sin^2 63+sin^227

=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

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