Question

if sin x = -3/5 and x is in quadrant 3, then tan2x = ____.
-24/7
24/7
12/7
-12/7

Answer 1

Then for tan(2x) you have to use the identity/formula for double angles

Answer 2

which is tan(2x) = 2tan(x) / 1 - tan(x)^2

Answer 3

Can you go on from here? Just substitute tan(x) into that equation :)

Answer 4

so 12/7 correct?

Answer 5

I get 24/7 :) perhaps you forgot to double the top where it is 2tanx / 1- tan(x)^2

Answer 6

oh i see thanks!

Answer 7

24/7