Math Help Plz
posted by Anonymous .
The point (3,8) is on the terminal arm of the angle x. Find sinx exactly and find x, in radians, to two decimal places.
I don't how I should start this question.
please help and thank you

you know that tanθ = y/x = 8/3
Arctan(8/3) = 1.21
so, since we are in the 4th quadrant,
θ = 1.21