If `sum_(i=1)^10 sin^-1 x_i = 5pi then sum_(i=1)^10 x_i^2 =` (A) 0 (B) 5 (C) 10 (D) none of these

If sum_(i=1)^200 sin^-1 x_i=100pi, then sum _(i=1)^200 x_i^2 is equal to

If sum_(i=1)^(n)sin x_(i)=n then sum_(i=1)^(n)cot x_(i)=

If sum_(i=1)^(n)sin x_(i)=n then sum_(i=1)^(n)cot x_(i)=

sum_(i=1)^(n)cos^(-1)alpha_(i)=0 then sum_(i=1)^(n)alpha_(i)(A)n(B)-n (C) 0 (D) None of these

If sum_(i=1)^(2n)cos^(-1)x_(i)=0 , then sum_(i=1)^(2n)x_(i) is :

If barx=1/n sum_(i=1)^n x_i then prove that sum_(i=1)^n (x_i-barx)=0

If sum_(i=1)^(2n)sin^(-1)x_(i)=n pi then find the value of sum_(i=1)^(2n)x_(i)

For observations x_i given sum_(i=1)^10 (X_i - 5) = 10 and sum_(i=1)^10 (X_i - 5)^2 = 40 If mean and variance of observations (x_1 - 3),(x_2 - 3),(x_3 - 3).........(x_10 - 3) is lambda & mu respectively then ordered pair (lambda, mu) is

sum_(i=1)^(n)cos theta_(i)=n then sum_(i=1)^(n)sin theta_(i)