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If `x^2+y^2+z^2=r^2,t h e ntan^(-1)((x y)/(z r))+tan^(-1)((y z)/(x r))+tan^(-1)((x z)/(y r))`is equal to`pi`(b) `pi/2`(c) 0(d) none of theseA. `pi`B. `(pi)/(2)`C. 0D. none of these |
Answer» Correct Answer - B | |