Need help with Trig Sum Formulas Question

Trigonometric ratios and functions, the unit circle, inverse trig functions, identities, trig graphs, etc.
gmorrow2
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Joined: Fri Mar 26, 2010 11:35 pm
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Need help with Trig Sum Formulas Question

Postby gmorrow2 » Fri Mar 26, 2010 11:55 pm

Can someone help me solve this:

tan(a-b)

cosa = -4/5 Lies in Quadrant 3

sinb = 1/3 Lies in Quadrant 1

mathnoob
Posts: 8
Joined: Tue Jul 28, 2009 12:39 pm

Re: Need help with Trig Sum Formulas Question

Postby mathnoob » Sat Mar 27, 2010 11:54 am

just plug into the angle diff formula for tan: http://oakroadsystems.com/twt/sumdiff.htm#TanSum


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