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Question
cos 45° = ?
Options
sin 45°
sec 45°
cot 45°
tan 45°
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Solution
sin 45°
Explanation:
`cos 45^circ = 1/sqrt2`, `sin 45^circ = 1/sqrt(2)`
∴ cos 45° = sin 45°
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∴ sin θ = `9/41`
The value is cosec θ = `41/9`, and sin θ = `9/41`
