Inverse Trigonometric FunctionHard
Question
If cos-1x − cos-1
= α. Then 4x2 − 4xy cos α + y2 is equal to-
= α. Then 4x2 − 4xy cos α + y2 is equal to-Options
A.2 sin 2
B.4
C.4 sin2 α
D.− 4 sin2 α
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