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smacias47 smacias47
  • 21-03-2017
  • Mathematics
Answered

Prove the identity. sin(−θ) cot(−θ) = cos θ

Verified Answer :

ghanami
ghanami ghanami
  • 22-03-2017

Hello :
 sin(−θ) = - sin(θ)
 cot(−θ) = - cot(θ)
cot(θ) = cos(θ)/sin(θ)
sin(−θ) cot(-θ) = (- sin(θ))×(-cos(θ)/sin(θ)) = cos(θ)

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