Find the value of
10!/8!

Find the values of (1)/(12!) + (1)/(10! 2!) + (1)/(8!4!) + …+ (1)/(12!)

The mean of 7,5,8,p and 11 is 8. Find the value of p.

Q. |(x+y,x,x),(15x+4y,4x,2x),(10x +8y,8x,3x)|=51x^3 Find the value of x.

Find the values of cos pi/8

If the mean of 6, 4, 7, p and 10 is 8 Find the value of p .

If .^(10)P_(r) =5040 , find the value of r

If the mean of 6, 4, 7, p and 10 is 8, find the value of p.

Let alpha and beta be the roots of the equation x^2-6x-2=0 If a_n=alpha^n-beta^n for ngt=0 then find the value of (a_10-2a_8)/(2a_9)

Find the value of tan pi/8 .

Find the value of : 10% of 250