Mathematics · Trigonometry
The product of cos(A + B) and cos(A - B) is equal to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1sin2 A - cos2 B
- 2cos2 A - cos2 B
- 3cos2 A - sin2 B✓
- 4sin2 A - sin2 B
Correct answer
cos2 A - sin2 B
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