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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

3 years ago

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may be the question is wrong or may be the value ofdy/dx ...or dx/dy are equal to 1 at k = sina

2 years ago

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f(x)=[tan 2 x]
 
 
Please post the complete question.
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Vijay Mukati one month ago
 
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….…..then ….…....then sir i can not understand this step please explain again fully
 
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