tanA / secA - 1 + tanA / secA + 1
sinA/cosA / 1/ cosA - 1 + sinA/cosA / 1/cosA + 1
on simplifying
sinA / 1 - cosA + sinA / 1 + cosA
sinA + sinA.cosA + sinA - sinA.cosA / 1 - cos2A
2sinA / sin2A
2 / sinA
2cosecA
Prove the following trigonometric identities:
tan A1+sec A−tan A1−sec A=2 cosec A