1.

The value of `cot((pi)/(4)+theta)cot((pi)/(4)-theta)` isA. -1B. 0C. 1D. Not defined

Answer» Correct Answer - C
Given expression, `" "cot((pi)/(4)+theta)-cot((pi)/(4)-theta)`
`" "=((cot""(pi)/(4)cottheta-1)/(cot""(pi)/(4)+cottheta))*((cot""(pi)/(4)cottheta+1)/(cottheta-cot""(pi)/(4)))`
` " " =((cottheta-1)/(cottheta+1))*((cottheta+1)/(cottheta-1))`
=1


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