If A = 2(sin6 θ + cos6 θ) - 3(sin4 θ + cos4 θ) then the value – McqOptions

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1.	If A = 2(sin6 θ + cos6 θ) - 3(sin4 θ + cos4 θ) then the value of 3α such that \(cos\alpha = \sqrt{\frac{3+A}{5+A}} \) is:
A.	180∘
B.	90∘
C.	45∘
D.	135∘
Answer» E.

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