Asked by mien
in proving trigonometric identities if sec theta - tan theta sin theta is equal to cos theta. what is the correct answer?
Answers
Answered by
Reiny
secØ - tanØsinØ = cosØ
LS (left side)
= 1/cosØ - (sinØ/cosØ)sinØ
= (1 - sin^2 Ø)/cosØ
= cos^2 Ø/cosØ
= cosØ
= RS
LS (left side)
= 1/cosØ - (sinØ/cosØ)sinØ
= (1 - sin^2 Ø)/cosØ
= cos^2 Ø/cosØ
= cosØ
= RS
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