Mathematics · Trigonometry

Evaluate: cos 10° + cos 80°sin 80° - sin 10°

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1tan 70°
2tan 20°
3tan 55°✓
4tan 35°

Correct answer

tan 55°

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Evaluate: cos 10° + cos 80°sin 80° - sin 10°

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