Mathematics · Trigonometry
What is the standard trigonometric identity for cos(2A) in terms of sin(A)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 12cos2(A) + 1
- 2sec(A)
- 31 - 2sin2(A)✓
- 4sin(A)
Correct answer
1 - 2sin2(A)
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