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