Hi Monika
Trigonometry for class 11 is here https://www.teachoo.com/subjects/cbse-maths/class-11th/ch3-11th-trigonometric-functions/
And for class 10 is here https://www.teachoo.com/subjects/cbse-maths/class-10th/ch8-10th-introduction-to-trignometry/
Written on Aug. 26, 2017, 9:44 p.m.