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Please help me with this question please

Please help me with this question please-example-1

1 Answer

5 votes

Answer:

○ sin 15° = sin 30°⁄2 = ±√[1 - cos 30°\2]

Explanation:

According to the Sine Half-Angle Identity, this is the formula:

sin x = sin ˣ⁄2 = ±√[1 - cos x\2]

Notice the -cos x\2 inside the radical. The second option nearly resembles this option. It has a positive symbol inside. Do not let this confuse you. The Cosine Half-Angle Identity is the formula that has a positive in the radical:

cos x = cos ˣ⁄2 = ±√[1 + cos 30°\2]

I am joyous to assist you anytime.

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