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The value of `(1)/(co s e ctheta-cottheta)-(1)/(sintheta)` is

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The value of `(1)/(co s e ctheta-cottheta)-(1)/(sintheta)` is
A. 1
B. `cot theta`
C. `co s ectheta`
D. `tantheta`
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Correct Answer - b
`(1)/(co s ectheta-cottheta)-(1)/(sintheta)`
`rArr(co s ec^(2)theta-cot^(2)theta)/(co s ectheta -cottheta)-co s ec theta`,
`[1=co s ec^(2)theta-cot^(2)theta]`
`rArrco s ectheta+cottheta-co s ectheta=cottheta`
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