Mathematics · Trigonometry

The value of sin(π5) + sin(2π5) + sin(3π5) + sin(4π5) is:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

114(√5 - 1)(√(10 + 2√5))
214(√5 + 1)(√(10 + 2√5))✓
3√5
41

Correct answer

14(√5 + 1)(√(10 + 2√5))

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The value of sin(π5) + sin(2π5) + sin(3π5) + sin(4π5) is:

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