orthogonality in sine and cosine function in telugu|| ushendra's engineering tutorials

[@vijayakumar-yg9cf]

Hai sir good morning happy teacher's day sir

[@ushendrasengineeringtutori4259]

Thank you very very much

[@pandukatta9813]

Sir are you from aditya clg??

[@ushendrasengineeringtutori4259]

Ha, first campus..