1.

Determine the differentials in each of the following cases. r = 4/(1 +sin theta)

Answer»

Solution :`r = 4/(1 +SIN THETA)`
`DR =(- 4 COS theta)/((1 + sin theta)^2` =`d theta`
= -(4 cos theta)/((1 + sin theta)^2` `dtheta`


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