Mathematics · Trigonometry

If sin(18°) = √5 - 14, then the value of cos2(48°) - sin2(12°) is:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1-√5 + 18
2√5 - 18
3√5 + 18✓
4-1 - √58

Correct answer

√5 + 18

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If sin(18°) = √5 - 14, then the value of cos2(48°) - sin2(12°) is:

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If sin(18°) = √5 - 14, then the value of cos2(48°) - sin2(12°) is:

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