Suppose that sinθ=8/17 and θ is in the second quadrant. Find sin(2θ), cos(2θ), and tan(2θ) exactly.

Question

mathmale · Answer

Welcome to OpenStudy, Jane!
I'd suggest you draw the angle theta.  You know this angle is in the 2nd quadrant, and that its opposite side is 8, and its hypotenuse 17.  You OK with drawing this?

anonymous · Answer

yes i can draw it

mathmale · Answer

Please go ahead.  And while you're drawing it, please try to estimate what the angle theta is.  If you double this angle, in which quadrant will you find the resulting doubled angle?

mathmale · Answer

Jane...making progress?  Are you familiar with the Draw utility, which is one of the OpenStudy tools available to you?  See the Draw button just below this comment.

anonymous · Answer

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