Mathematics · Trigonometry
If sin x + cos x = e, then the value of cos2 2x is
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 12e21 + e2
- 22e2 - e42✓
- 31 - (e2 - 1)22
- 41 - e2
Correct answer
2e2 - e42
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