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If 0lt=xlt=2pi, then 2^(cosec^2(x)) sq...

If `0lt=xlt=2pi,` then `2^(cosec^2(x))` `sqrt(1/2y^2-y+1)lt=sqrt(2)` (a) is satisfied by exactly one value of `y` (b) is satisfied by exactly two value of `x` (c) is satisfied by `x` for which `cosx=0` (d) is satisfied by `x` for which `sinx=0`

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