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If theta is an acute angle and t a nthet...

If `theta` is an acute angle and `t a ntheta=1/(sqrt(7))` , then the value of `(cos e c^2theta-sec^2theta)/(cos e c^2theta+sec^2theta)` is `3//4` b. `1//2` c. `2` d. `5//4`

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`tan theta = 1/sqrt7`
`=> cosec theta=sqrt8` and `sec theta =(sqrt8)/sqrt(7)`
Putting these values in the given expression, we get the values as `3/4`
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