IloveCharlie
Please help! Given: sinA=3/5, cosB=15/17, angle A in Quadrant III and angle B in Quadrant I.
cos2B=
a. 64/289
b. 161/289
c. 225/289
d. 240/289



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NotTim
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eh...did you do wat I told you to do last time? def help you much

IloveCharlie
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I tried it but for some reason this problem is harder than the last :/ I'll ask around

NotTim
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is your calc in deg or rad?

IloveCharlie
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Degree

NotTim
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that MIGHT be it...im not sure

IloveCharlie
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Would you be able to go through the problem with me step by step or should I just keep asking for help? It's fine if you can't :)

NotTim
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eh...im no good at math.

NotTim
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but, YOU DID find that circle pi chart right?

IloveCharlie
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Yup, thanks

NotTim
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well...sorry i couldn't help much. but good luck eh