Posted by **PLEASE:(** on Tuesday, December 18, 2012 at 8:47pm.

If the given point is on the terminal arm of an angle A in stadard position. 0 degrees more than or equal too A and less than or equal too 180 degree, find sin A and cos A:

a) (6,8) b) (-5,12)

Can you tell me how you get it because I do not understand it at all please help!

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