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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.
