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 = 3 / 4
A.	(3 / 5)
B.	(3 / 4)
C.	(6 / 111)
D.	(1 / 126)
Answer» C. (6 / 111)

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