(sina + cosa) (tana + cot a) = seca + coseca
Answers
Answered by
1
ANSWER
Give(cosA−sinA)(secA−CosA)=tanA+cotA1
L.H.S.(coscA sinA)(secA-cosA)
⇒L.H.S=(sinA1−sinA)(cosA1−cosA)
⇒L.H.S=(sinA1−sin2A)(cosA1−cos2A)
⇒L.H.S=sina.cosAcos2A.sin2A[∵sin2A+cos2A−1cos2A−1−sin2Asin2A=1−cos2A]
⇒L.H.S=1sinA.cosA
⇒L.H.S=sin2A+cos2AsinA.cosA
⇒L.H.S==cosAsinA+sinAcosA1
⇒L.H.S=tanA+cotA1
=R.H.S
⇒L.H.S = R.H.S
Similar questions
Biology,
3 months ago
Computer Science,
3 months ago
Hindi,
7 months ago
Business Studies,
11 months ago
Hindi,
11 months ago