Mathematics · Trigonometry

The expression cos 2θ cos 2φ + sin2(θ - φ) - sin2(θ + φ) is equal to:

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1sin 2(θ + φ)
2cos 2(θ + φ)✓
3sin 2(θ - φ)
4cos 2(θ - φ)

Correct answer

cos 2(θ + φ)

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The expression cos 2θ cos 2φ + sin2(θ - φ) - sin2(θ + φ) is equal to:

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The expression cos 2θ cos 2φ + sin2(θ - φ) - sin2(θ + φ) is equal to:

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