The greatest value of 5 sin2 x + 7 cos2 x - 4 sin x cos x will be: – McqOptions

MCQOPTIONS

1.	The greatest value of 5 sin2 x + 7 cos2 x - 4 sin x cos x will be:
A.	6 - √5
B.	6 + √5
C.	-6 + √5
D.	-6 - √5
Answer» C. -6 + √5

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