Question
If cos-1 x - cos-1 y/2 = α, then 4x2 − 4xy cos α + y2 is equal to
-
2 sin 2α
-
4
-
4 sin2 α
-
− 4 sin2 α
Solution
C.
4 sin2 α
Sponsor Area
If cos-1 x - cos-1 y/2 = α, then 4x2 − 4xy cos α + y2 is equal to
2 sin 2α
4
4 sin2 α
− 4 sin2 α
C.
4 sin2 α
Sponsor Area
Mock Test Series
