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I tan(picostheta)=cot(pisintheta), then ...

I `tan(picostheta)=cot(pisintheta), then cos(theta-pi/4)` is (A) 0 (B) `1/2sqrt(2)` (C) `1/sqrt(2)` (D) none of these

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If tan(picostheta)=cot(pisintheta) , then cos(theta-(pi)/(4))=(1)/(2sqrt(2)) .

If tan(picostheta)=cot(pisintheta) , then cos(theta-(pi)/(4))=pm(1)/(2sqrt(2)) .

If tan(picostheta)=cot(pisintheta) , then cos(theta-(pi)/(4))=pm(1)/(2sqrt(2)) .

If tan(picostheta)=cot(pisintheta), then prove that cos(theta-(pi)/(4))=pm(1)/(2sqrt(2))

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