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प्रश्न
Evaluate the following: `(sin25° cos43°)/(sin47° cos 65°)`
उत्तर
`(sin25° cos43°)/(sin47° cos 65°)`
= `(sin(90° - 65°) cos(90° - 47°))/(sin47° cos65°)`
= `(cos65° sin 47°)/(sin47° cos65°)`
= 1.
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