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Eamcet Mathematics
Trigonometry Inverse Trigonometric Functions

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If cos^-1x + cos^-1y + cos^-1z =π , then

A. x²+y²+z²+xyz=0

B. x²+y²+z²+2xyz=0

C. x²+y²+z²+2xyz=1

D. x²+y²+z²+xyz=1

E. None of the above

View Answer

Correct choice: C

Explanation:

None

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Eamcet Mathematics Trigonometry Inverse Trigonometric Functions

Eamcet Mathematics
Trigonometry Inverse Trigonometric Functions