Doubt from study of solid angle concept for gauss law

Here is given solid angle concept is it in syllabus of jee and is it required to study or it is time waste ?

It is used in many questions of jee to short the answers. It helps a lot.

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Bro our sir taught this by using this u can save 3-4 pages of integration

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If your are aiming for mains then u can leave it because it has hardly any use in mains level problem (exception exist) . But for advanced you can't

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Ok

It simplifies many questions , and it is hardly a 15 min topic , so I don’t see a point in leaving it .

Ok thank you

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