Question

If sinx = -3/5 and x is in quadrant 3, then tan2x = ________.

Answer 1

solve for cos, then its just running sin(2x)/cos(2x) unless you can recall the identity of tan(2x)

Answer 2

@ilfy214 It sounds like you are taking a quiz.

Answer 3

180 < x < 180 + 90

360 < 2x < 360 + 180

Answer 4

so 2x is going to be in Q1 or Q2

Answer 5

we can narrow it down further (-4,-3) is less then a 45 reference so this is between 180 and 180+45

2x will be between 360 and 160+90 so Q1

Answer 6

360+90

Answer 7

I solved it. The answer is D. 24/7