# find the requested trig function value of...

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• October 25th 2007, 05:11 PM
HelpMePleaseFriend
find the requested trig function value of...
Find the requested function value of θ.

If sin θ = 4 over 13, find cos θ

help plz :)
• October 25th 2007, 06:38 PM
Jhevon
Quote:

Originally Posted by HelpMePleaseFriend
Find the requested function value of θ.

If sin θ = 4 over 13, find cos θ

help plz :)

recall $\sin^2 \theta + \cos^2 \theta = 1$

plug in the value for $\sin \theta$ and solve for $\cos \theta$