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Trigonometry 11 Online
OpenStudy (anonymous):

Can anyone help me with my trig. homework?

OpenStudy (anonymous):

I tried to do it and i keep on getting answers that is not there :(

OpenStudy (noelgreco):

You need to know the formulas for sines and cosines of sums and differences. Then, plugging in your unit circle values you'll get one of the answers. Can't help if you don't show what you're trying.

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