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प्रश्न
If tan θ = 1, then sin θ . cos θ = ?
उत्तर
tan θ = 1 ......[Given]
∴ θ = 45° ......[∵ tan45° = 1]
∴ sin θ . cos θ = sin 45° cos 45°
= `1/sqrt(2)*1/sqrt(2)`
= `1/2`
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