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प्रश्न
Without using trigonometric table , evaluate :
`cosec49°cos41° + (tan31°)/(cot59°)`
उत्तर
`cosec49°cos41° + (tan31°)/(cot59°)`
⇒ `sec(90^circ - 41^circ)cos41^circ + cot(90^circ - 59^circ)/cot56^circ`
⇒ `sec41^circ cos41^circ + cot59^circ/cot59^circ` = 1+ 1 = 2
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