Question

prove cos 20°/. sin 70° = 1
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Answer 1

Answer:

· Given cos 20 / sin 70 degree + 2 cos theta/ sin(90-theta) = k/2= cos(90-70)/ sin ... cos(90-70)/sin 70 + 2 cos theta/cos theta = k/2 [sin(90-theta) = cos theta] ... 1

Answer 2

Hêy Fríèñd

Here is the Solution..

cos 20°

= cos ( 90° - 70° )

= sin 70° (Trigonometry ratios of complementary angles)

Therefore

$\frac{ \cos(20) }{ \sin(70) } = \frac{ \sin(70) }{ \sin(70) } = 1$

Hence Proved

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I Hope This Will Help You

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