If `x` is any real number then show that `cos theta` cannot be equal to `x+ 1/x.`

If x is any non-zero real number,show that cos theta and sin theta can never equal to x+(1)/(x)

If x be any rational number then x + 0 is equal to

If theta is any real number, then, in a triangle ABC, prove that a cos (B - theta) + b cos (A + theta) = c cos theta .

A real number x is such that (x - x^2) is maximum. What is x equal to ?

For any real number x,[x] denotes the largest integer less than or equal to and {x}=x-[x] The number of real solutions of 7[x]+23{x}=191 is (A) 0 (B) 1 (c) 2 (D) 3

If x and y are real numbers such that sin^2theta=(x^2+y^2)/(2xy) show that x=y .

If x=(2sin theta)/(1+cos theta+sin theta), then prove that (1-cos theta+sin theta)/(1+sin theta) is equal to x

For any real number x,the value of int_(0)^(x)[x]dx is

If x=(cos theta)/(1-sintheta), then (cos theta)/(1+sin theta) is equal to