I've been staring at this question...for so long.

if cos/theta = 1/3 , find the value of 6sin^2/theta - 6

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- Nov 26th 2010, 07:46 PMSOHCAHTOAFinding value of sin(theta) from value of cos(theta).
I've been staring at this question...for so long.

if cos/theta = 1/3 , find the value of 6sin^2/theta - 6 - Nov 26th 2010, 07:47 PMProve It
Use the Pythagorean Identity:

$\displaystyle \displaystyle \sin^2{\theta} + \cos^2{\theta} = 1$.

Substitute $\displaystyle \displaystyle \cos{\theta}$ and then rearrange. - Nov 26th 2010, 07:51 PMSOHCAHTOA
Thanks for the tip!! :D