The value of cos²(60°) + sin²(30°) = ______?
- 3/2
- 2/3
- 1/2
- None of these
Explanation
cos(60°) = 1/2, sin(30°) = 1/2
cos²(60°) + sin²(30°) = (1/2)² + (1/2)²
= 1/4 + 1/4
= 1/2
cos(60°) = 1/2, sin(30°) = 1/2
cos²(60°) + sin²(30°) = (1/2)² + (1/2)²
= 1/4 + 1/4
= 1/2
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