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If $sinA = \frac{1}{2}$, find the value of sin3A

written 5.6 years ago by teamques10 ★ 69k

modified 3.0 years ago by pedsangini276 • 4.8k

engineering mathematics

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1 Answer

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written 5.6 years ago by teamques10 ★ 69k

$sin3A = 3sinA - 4sin^{3}A$ $= 3\big(\frac{1}{2}\big) - 4\big(\frac{1}{2}\big)^{3}$

= 1

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