1.

5 tan square A - 5 sec square A

Answer» This can be solve in easy way see...-5(sec square A - tan square A) = -5×1 = -5
sec^2A - tan^2A=1sec^2A= 1+tan^Atan^2A - sec^2A=15 tan^2A - 5 sec^2A5(tan^2A - sec^2A)5(1)=5


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