Prove that : Cos 2A =cot^2-1/cot^2+1​

Venus is about 108 kilometers from the sun. saturn is about 109 kilometers from the sun. about how many times farther from the sun is saturn than venus?

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?