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प्रश्न
Evaluate the following: `(cos34° cos35°)/(sin57° sin56°)`
उत्तर
`(cos34° cos35°)/(sin57° sin56°)`
= `(cos(90° - 56°) cos(90° - 57°))/(sin57° sin56°)`
= `(sin56° sin57°)/(sin57° sin56°)`
= 1.
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