Posted by natalie on Monday, January 23, 2012 at 11:48am.
Left Side
= 1/(1 - sinØ) * 1/(1+sinØ)
= 1/((1-sinØ)(1+sinØ)
= 1/(1-sin^2 Ø)
= 1/cos^2 Ø
= sec^2 Ø
= Right Side
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