Homework Help: Please help!!!)

Posted by Bryan on Friday, March 19, 2010 at 3:10pm.

If sin(x) = /45 and cos(y) = 5/13 with both x and y terminating in quadrant 1 find the exact value of cos(x-y)

cos(4/5 - 5/13)

Is this what I would do?

Math - Writeacher, Friday, March 19, 2010 at 4:26pm
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