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November 27, 2014

November 27, 2014

Posted by **Tye** on Wednesday, March 10, 2010 at 5:19pm.

- trig 30 -
**FredR**, Wednesday, March 10, 2010 at 6:41pmcsc=1/sin

cot=cos/sin

so,

csc^2-1/cotcsc =

((1/sin^2)-1)sin/(cos/sin) =

sin((sin/sin^2)-sin)/(cos) =

(sin^2/sin^2-sin^2)/cos =

(1-sin^2)/cos =

cos^2/cos = cos A

((sin^2/sin^2)-sin/(sin^2 cos)

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