Indian Online Education

https://www.youtube.com/watch?v=BEIIreysZ28

If SinA + 2CosA = 1 then prove that 2SinA - CosA = 2

https://www.youtube.com/watch?v=fq91sHyyPSc

If TanA + SecA = x , then prove that SecA = (x^2 + 1)/2x

https://www.youtube.com/watch?v=IZUHxppelUE

Quadratic equation problem for class 10

https://www.youtube.com/watch?v=CpVpc3cZjcE

Application of trigonometry imp question class 10

https://www.youtube.com/watch?v=NFtjXl9TUG8

If CosA + Cos^2A = 1, then Prove that Sin^2A + Sin^4A = 1

https://www.youtube.com/watch?v=gYKix9XNPxw

If CosecA + CotA = p then prove that CosA = (p^2 - 1)/(p^2 +1)

https://www.youtube.com/watch?v=67LXJsKeKOg

If 1 + Sin^2A = 3SinA.CosA then prove that TanA = 1 or 1/2

https://www.youtube.com/watch?v=cGrv-1q_H9c

If a^2 , b^2 , c^2 are in A.P. then prove that a/(b+c) , b/(c+a) , c/(a+b) are in A.P.

https://www.youtube.com/watch?v=ovdFFGv-824

If aSinQ + bCosQ = c then prove that aCosQ - bSinQ = √(a^2 + b^2 - c^2)

https://www.youtube.com/watch?v=S9cdWldagrw

Split 207 into 3 parts such that these are in A.P. and product of two smaller part is 4623.

https://www.youtube.com/watch?v=2seV5CU0yLM

Find 12th term from the end of an A.P. -2, -4, -6, . . . -100.

https://www.youtube.com/watch?v=xeEFGKmH3sI

Find first negative term of an A.P. 53, 48, 43, . . .