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| 1. |
ntIf cos-1(x/m) +cos-1(y/n)=α, then x2/ m2-2xycosα/mn+ y2/ n2 =n |
| Answer» ntIf cos-1(x/m) +cos-1(y/n)=α, then x2/ m2-2xycosα/mn+ y2/ n2 =n | |