Select and write the correct answer from...

Select and write the correct answer from the given alternatives in each of the following:The value of `frac(costheta)(1+sintheta)` is equal to=…..

A

`tan(theta/2-pi/4)`

B

`tan(frac(-pi)(4))-(frac(theta)(2))`

C

`tan(pi/4-theta/2)`

D

`tan(pi/4+theta/2)`

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