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Find the most general value of theta sa...

Find the most general value of ` theta` satisfyingn the equation `tantheta=-1 and costheta=(1 )/(sqrt(2))`.

A

`npi+(7pi)/(4)`

B

`npi+(-1)^(n)(7pi)/(4)`

C

`2npi+(7pi)/(4)`

D

none of these

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The correct Answer is:
C
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TARGET PUBLICATION-TRIGONOMETRIC FUNCTIONS -Competitive Thinking
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