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September 30, 2014

September 30, 2014

Posted by **Lucy** on Saturday, August 30, 2008 at 8:40pm.

tanx/cotx - secx/cosx = 2/cscx

a) cscx=1

b) sinx=-1/2

c)cscx=-1

d)sinx=1/2

- Pre-Calculus -
**Reiny**, Saturday, August 30, 2008 at 11:08pm(sinx/cosx)/(cosx/sinx) - (1/cosx)/cosx = 2sinx

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

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

(sin^2 x - 1)/(1 - sin^2 x) = 2sinx

-1 = 2sinx

sinx = -1/2

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