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प्रश्न
Evaluate: `(5 "cosec"^2 30^circ - cos 90^circ)/(4 tan^2 60^circ)`
उत्तर
`(5 "cosec"^2 30^circ - cos 90^circ)/(4 tan^2 60^circ)`
= `(5(2)^2 - (0))/(4 xx (sqrt(3))^2`
= `20/(4 xx 3)`
= `5/3`
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