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If tan^(-1)(sin^2theta-2sintheta+3)+cot^...

If `tan^(-1)(sin^2theta-2sintheta+3)+cot^(-1)(5sin^(2theta)+1)=pi/2,` then value of `2cos^2theta-sintheta` is equal to 0 (b) `-1` (c) `1` (d) none of these

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CENGAGE-INVERSE TRIGONOMETRIC FUNCTIONS-All Questions
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