How did 15 degree come in the following equation.

http://dc474.4shared.com/download/8_...55515-f1b2071a

plz help.

thanks in advance

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- December 19th 2011, 09:55 PMSiddSinverse of trigonometry
How did 15 degree come in the following equation.

http://dc474.4shared.com/download/8_...55515-f1b2071a

plz help.

thanks in advance - December 19th 2011, 11:41 PMCaptainBlackRe: inverse of trigonometry
- December 21st 2011, 07:31 AMsbhatnagarRe: inverse of trigonometry

Using the formula:

we get