Question

1/1+sin theta + 1/1-sin theta)=2sec2 theta

Answer 1

$\frac{1}{ 1 + \sin \alpha } + \frac{1}{1 - \sin \alpha } \\ \\ \frac{1 - \sin\alpha + 1 + \sin \alpha }{1 - { \sin}^{2} \alpha } \\ \frac{2}{ { \cos }^{2} \alpha } = 2 { \sec }^{2} \alpha \\ proved$

Answer 2

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