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[" याद "sin theta=cos^(2)theta," if "cos...

[" याद "sin theta=cos^(2)theta," if "cos^(2)theta(1+cos^(2)theta)],[" हाrा- "],[[" (a) "1," (b) "0],[" (c) "cos^(2)theta," (d) "2sin theta]]

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