Mathematics · Trigonometry
Which of the following trigonometric identities is true for all acute angles A?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1sin A = sin(90° - A)
- 2sin A = cos(90° - A)✓
- 3cos A = tan(90° - A)
- 4cot A = sin(90° - A)
Correct answer
sin A = cos(90° - A)
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