Here is the answer mate....
a^4+b^4=a^2+b^2-a^2×b^2
put a and b as sin and cos...
sin^2@+cos^2@=1
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Here is the answer mate....
a^4+b^4=a^2+b^2-a^2×b^2
put a and b as sin and cos...
sin^2@+cos^2@=1