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Tan² theta minus one by cos square theta = -1 |
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Answer» Anjali\'s ans is correct. Consider tan²theta - 1/cos²theta Tan²theta -sec²theta ....(1/cos²theta =sec²theta) identity Therefore tan²theta -sec²theta =-1...(1+tan²theta=sec²theta therefore tan²theta -sec²theta =-1)Hence proved. |
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