Find the next term of AP: √7,√28,√63,.........

How do you integrate 1-sinx/cos*2x

how in second, step

comes

ans of 2 question along with solution 

Q 1: if AB and AC are equal sides of an isosceles   triangle prove that tanA/2 = cotB

sir, please upload vidoe lecture of each and every question of maths class 11. Its really helpful. Thank You!

what is the ans of this que

a point E is taken on the side of parallelogram ABCD. AE and DC are produced to meet at F. Prove that area of triangleDEC is equal to area of triangleDEC BEF

 why can't we take 1 as the identity element? Because 1/1 =1/1=1

1. Sinx=-1/2