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प्रश्न
cos 45° = ?
पर्याय
sin 45°
sec 45°
cot 45°
tan 45°
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उत्तर
sin 45°
Explanation:
`cos 45^circ = 1/sqrt2`, `sin 45^circ = 1/sqrt(2)`
∴ cos 45° = sin 45°
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