Published by:
CGP EDU Academic Team
Published on: August 13, 2026
If x = y cos 
= z cos 
, then xy + yz + zx is equal to...............
Text Solution
Verified by ExpertsThe correct answer is:
0
(0)
x = y cos 
= z cos 
⇒ x = – 
= – 
⇒ y = z = –2x
∴ xy + yz + zx = –2x 2 + 4x 2 –2x 2 = 0
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