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The value of cos²29° + cos²61° is –

SSC · 2024 · Quantitative Aptitude
Question:
The value of cos²29° + cos²61° is –

Options

(1) √3/2
(2) 2
(3) 1
(4) 0
Answer: (3) 1

Explanation:
cos²29° + cos²61° = cos²29° + sin²29° = 1 (since 29°+61°=90°)

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