if sinA-cosA=0 find value of sin^4A+cos^4A
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sina-cosa=0
sina=cosa
a=π/4....or other multiples,, here doesn't matter as here even power of that is to b find so it will b positive always
sin^4 a + cos^4 a=2(1/√2)^4=1/2
sina=cosa
a=π/4....or other multiples,, here doesn't matter as here even power of that is to b find so it will b positive always
sin^4 a + cos^4 a=2(1/√2)^4=1/2
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