how would you go about solving this: if sin x = -4/5, and 270 degrees < x < 360 degrees, then find tan2x
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Originally Posted by Kesha how would you go about solving this: if sin x = -4/5, and 270 degrees < x < 360 degrees, then find tan2x From and the fact that x is in the fourth quadrant it follows that . Therefore .....
(1) If . Then, . Now, substitute in (1) and find .
thanks, was easy to do. i just approached it incorrectly.
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