smacias47
smacias47
22-03-2017
Mathematics
contestada
Prove the identity. sin(−θ) cot(−θ) = cos θ
Respuesta :
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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