Question

prove that (1/1+cos theta)+(1/1-cos theta)=2/sin²theta​

Answer 1

Step-by-step explanation:

(1/1+Cos theta) + (1/1-Cos theta)

(1-Cos theta+1+Cos theta)/(1+Cos theta)(1-Costhet)

2 / (1 - Cos² theta)

2 / Sin²theta

2Cosec² theta