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What is the exact value of sin 120° ? Use a double-angle identity.
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What is the exact value of sin 120° ? Use a double-angle identity.

User Zayn Ali
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1 Answer

3 votes

Answer:


(√(3))/(2)

Explanation:

Sine is positive in the second quadrant, so:


\sin (240^(\circ))/(2)=\sqrt{(1-\cos 240^(\circ))/(2)} \\ \\ =\sqrt{(1.5)/(2)} \\ \\ =√(3/4) \\ \\ =(√(3))/(2)

What is the exact value of sin 120° ? Use a double-angle identity.-example-1
User TrueEddie
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