SOLUTION: If a point on the terminal side of the angle is (-3,4). What is the sine of an angle?

Question 1199750: If a point on the terminal side of the angle is (-3,4). What is the sine of an angle?
Answer by ikleyn(52847) (Show Source): You can put this solution on YOUR website!
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If a point on the terminal side of the angle is (-3,4). What is the sine of an angle?
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The point and the angle are in Q2 (2nd quadrant).


The legs of the right angled triangle are 3 units (horizontal) and 4 (vertical), 
the hypotenuse is 5 units.


The opposite side to the angle is 4 units; the hypotenuse is 5 units.


The sine of the angle is  .   The sign of the sine is positive in Q2.


ANSWER.  Sine of the angle is   = 0.8.

Solved.

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