find the value of 6 tan square A-6 sec square A
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we use the identity sec^2 A - tan ^2 A =1-----(1)
6tan^2 A - 6 sec ^2 A= -6 (sec^2A -tan ^2 A)
= -6*1 [ from(1)]
=-6
6tan^2 A - 6 sec ^2 A= -6 (sec^2A -tan ^2 A)
= -6*1 [ from(1)]
=-6
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