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प्रश्न
Choose the correct alternative:
`"d"/("d"x) (2/pi sin x^circ)` is
पर्याय
`pi/180 cosx^circ`
`1/90 cosx^circ`
`pi/90 cosx^circ`
`2/pi cosx^circ`
उत्तर
`1/90 cosx^circ`
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