Question on: WAEC Mathematics - 1992
Sin 60° has the same value as I. Sin 120° II. cos 240° III. -sin 150° IV. cos 210° V. sin 240°
A
I only
B
II only
C
IV only
D
III only
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Correct Option: A
In the second quadrant, \(\sin 120 = \sin (180 - 120)\)
= \(\sin 60\)
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