Question

if sinx=4/5 and x is in quadrant 2, then tan2x=

a. -27/7
b. 24/7
c. 12/7
d. -12/7

Answer 1

SOHCAHTOA

O / H = 4/5
A will be 3. You can use the pythagorean theorem to find that out. Quadrant two, x is neg and y is pos.

So. Y is 4, X is 3, H is 5. Plug in the values for the tan double angle. and you get your answer.

Answer 2

i got b

Answer 3

It has to be a negative value.

Answer 4

X is -3. Sorry.

Answer 5

so a

Answer 6

yes.

Answer 7

thank you!!!

Answer 8

no problem.