Math, asked by piyu965, 6 months ago

cos 70°
------------. + cos 36° cosec 54°
sin 20°

Answers

Answered by AarchiChhabria

3

Answer:

by complementary angle property

sinθ = cos(90-θ)

so,

cos 70°

--------------------+ cos 36°× 1

cos(90-20) ----------------

sin (90-54)

cos 70°

------------- + cos 36° × 1

cos 70° -----------

cos 36°

1+1

2

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