Simplify (sec^2A+tan^2A)^2-4sec^2A×tan^2A
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=(sec^2A+tan^2A)^2-4sec^2A×tan^2A
=( 1+tan^2A+tan^2A )^2-4(1+tan^2A)tan^2A
= (1+2tan^2A)^2-4 tan^2A-4tan^4A
=1+4tan^4A+4tan^2A-4tan^2A-4tan^4A
= 1+0+0
1. ans.
=( 1+tan^2A+tan^2A )^2-4(1+tan^2A)tan^2A
= (1+2tan^2A)^2-4 tan^2A-4tan^4A
=1+4tan^4A+4tan^2A-4tan^2A-4tan^4A
= 1+0+0
1. ans.
vm983855:
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