Question

Prove that cos(81degree+θ) = sin (9degree-θ) .​

Answer 1

Answer:

all the best

Answer 2

Answer:

Prove that: cos(81°- θ) = sin(9°- θ).

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1 Answer

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answered Jan 11, 2018 by priya12 (-12,631 points)

L.H.S = cos(81°+ θ)

= cos [90°-(9°-θ)]

= sin (9°-θ)

= R.H.S.