Mathematics · Trigonometry
If A = 10°, what is the value of: 12sin(3A) + 5cos(5A - 5°)9sin(9A/2) - 4cos(5A + 10°)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 16√2 + 59 - 2√2✓
- 26√2 - 59 - 2√2
- 39 - 2√26√2 + 5
- 46√2 + 59 + 2√2
Correct answer
6√2 + 59 - 2√2
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