[" 4"1" th "84times48],[" 1."sin(x^(2)+5)]

Show that "cos"^(-1) 4/5+"sin"^(-1) 15/17=(pi)/2+"cos"^(-1)84/85

Show that "cos"^(-1) 4/5+"sin"^(-1) 15/17=(pi)/2+"cos"^(-1)84/85

If 3rd,4th, 5th terms in the expansion of (a+x)^(n) be 84,280 and 560, Find x, a and n .

If the coefficients of (2r +1)th and (4r + 5) th terms is the expansion of (1+x)^(10) are equal then r=?

If in the expansion (1+x)^(n) the 5^(th ) term is 4 times the 4^(th) term and the 4^(th) term is 6 times the 3^(rd)' term, then n=

The 3rd , 4th and 5th terms in the expansion of (x+a)^(n) are respectively 84,280 and 560, find the values of x, a and n .

If 3rd, 4th, 5th terms in the expansion of (x+a)^n be 84, 280 and 560, Find x, a and n.