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`        If cosy=xcos(a+y). And dx/dy =k/1+(x)2-2xcosa...... Then find value of k  Now my main question is..For above que. We should diff. w.r.t "y" and we get k=sina.. ..And i see same que in diff book like this mainor..   .... If cosy=xcos(a+y). And dy/dx =k/1+(x)2-2xcosa...... Then find value of k ,and for this we should diff w.r.t "x"..And we get same ans. K=sina    then for this que. We prove dy/dx=dx/dy...   Thanks`
5 years ago

saiomkar kandukuri
33 Points
```										may be the question is wrong or may be the value ofdy/dx ...or dx/dy are equal to 1 at k = sina
```
5 years ago
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