Add the following 1. `5frac(1)(2)+4frac(1)(2)`

1.Add the following : 5/7 and 2/7

Prove the following: tan^(-1)(1/4)+tan^(-1)(2/9)=1/2cos^(-1)(3/5)

Prove the following: tan^(-1)(1/4)+tan^(-1)(2/9)=1/2cos^(-1)(3/5)=1/2sin^(-1)(4/5)

Add the following fractions: 2 3/5+4/5+\ 1 2/5 (ii) 1 1/4+\ 2 3/4+\ 7 1/4

Add the following fractions: 1/6+4/6 (ii) 2/7+3/7+4/7

Evaluate the following integrals: int frac{sqrt(1+x^2)}{x^4}dx

Evaluate the following integrals: int frac{sin^(-1)x}{(1-x^2)^(1backslash2)}dx

Evaluate the following integrals: int frac{(x^2+2)}{x+1}dx

Evaluate the following integrals: int frac{(1+cosx)}{x+sinx}dx

Use number line and add the following integers : (a) 9+(-6) (b) 5+(-11) (c) (- 1 )+ (-7) (d) (-5) + 10 (e) ( -1 ) + ( -2 ) + (- 3 ) (f) ( - 2 ) + 8 + (- 4)