Question

HELPPP!!

If sin thea 4/5 = and thea is in quadrant 2, the value of cot thea is _____. If necessary, use the slash mark ( / ) for a fraction bar.

Answer 1

use the identity :
cos^2 a = 1 - sin^2 a

Answer 2

so, cos^2 a = 1 - (4/5)^2
cos^2 a = 1 - 16/25
cos^2 a = 25/25 - 16/25
cos^2 a = 9/25
cos a = sqrt(9/25) = 3/5

Answer 3

because the a in the 2nd quadrant, it must be negative for cos
therefore, cos a = - 3/5

Answer 4

it was -3/4 thnks tho