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April 1, 2015

April 1, 2015

Posted by **Emmie** on Wednesday, February 15, 2012 at 9:45pm.

1+cos X/1-cos X = (csc X + cot X)squared

- trig -
**Steve**, Thursday, February 16, 2012 at 11:35amsort of like rationalizing radical expressions, multiply top and bottom by (1+cosX), giving

(1+cosX)^2

-------------

(1-cos^2X

= (1+cosX)^2/sin^2X

= [(1+cosX)/sinX]^2

= (cscX + cotX)^2

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