Mathematics · Trigonometry
The value of sin 18° is given as √5 - 14. Using this value, find the exact value of cos 18°.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1√10 - 2√54
- 2√6 + √24
- 3√5 + 14
- 4√10 + 2√54✓
Correct answer
√10 + 2√54
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