Question

find the exact value for sin theta if the point (12,-5) lies on the terminal side of an angle whose measure is theta.

Answer 1

Draw the terminal side on coordinate axes, and use the Pythagorean Theorem to find the radius (hypotenuse).

Answer 2

You have your reference angle on the wrong side of the radius.

Answer 3

sorry friend, it's me, not him . guide him, please

Answer 4

????

Answer 5

What's x= ?

Answer 6

13

Answer 7

good. now use sohcahtoah, or whatever method you've learned to find the sine of the reference angle. What do you get?

Answer 8

-5/13?

Answer 9

Bingo!

Answer 10

thank you!!! :)

Answer 11

Tep.