Question

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

Answer 1

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

Answer 2

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

Answer 3

is your calc in deg or rad?

Answer 4

Degree

Answer 5

that MIGHT be it...im not sure

Answer 6

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 :)

Answer 7

eh...im no good at math.

Answer 8

but, YOU DID find that circle pi chart right?

Answer 9

Yup, thanks

Answer 10

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