Three Dimensional Geometry Question 250
Question: The angle between the planes $ 3x-4y+5z=0 $ and $ 2x-y-2z=5 $ is
[MP PET 1988]
Options:
A) $ \frac{\pi }{3} $
B) $ \frac{\pi }{2} $
C) $ \frac{\pi }{6} $
D) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
$ \theta ={{\cos }^{-1}}[ \frac{6+4-10}{\sqrt{50}\sqrt{9}} ]={{\cos }^{-1}}(0)=\frac{\pi }{2} $ .
BETA
