Question
Mathematics Question on Inverse Trigonometric Functions
If cos−1x+cos−1y+cos−1z=3π then x(y+z)+y(x+z)+z(x+y)equals to
A
0
B
1
C
6
D
12
Answer
6
Explanation
Solution
The correct answer is Option (C) : 6
If cos−1x+cos−1y+cos−1z=3π then x(y+z)+y(x+z)+z(x+y)equals to
0
1
6
12
6
The correct answer is Option (C) : 6