Evaluate the expression cos^4 x - sin^4 x , given that cos^2 x - sin^2 – McqOptions

MCQOPTIONS

1.	Evaluate the expression cos^4 x - sin^4 x , given that cos^2 x - sin^2 x = 1 / 3
A.	(1 / 5)
B.	(1 / 41)
C.	(1 / 61)
D.	(1 / 3)
Answer» E.

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