Mathematics · Trigonometry
The value of cos(13°) · sin(17°) · sin(21°) · cos(47°) is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1132(1 + √2 - √3)
- 2116(1 + √3 + √5)
- 3116(2 + √3 - √5)
- 4132(1 + 2√3 - √5)✓
Correct answer
132(1 + 2√3 - √5)
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