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sinA - tanA and secA + tanA are reciprocals.
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1. take conjugate (secA-tanA) (secA+tanA)/(secA-tanA) =sec²A-tan²A/secA-tanA =1/secA-tanA (since sec²A-tan²A =1) it is the same for next also. i hope iam correct.rate me if it is useful . cheers!!!!!!!
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