Prove that : sin^4(2x)=3/8-1/2cos4x+1/8cos8x
Someone plzz help!!!

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

Raj encoded a secret phrase using matrix multiplication. using a = 1, b = 2, c = 3, and so on, he multiplied the clear text code for each letter by the matrix to get a matrix that represents the encoded text. the matrix representing the encoded text is . what is the secret phrase? determine the location of spaces after you decode the text. yummy is the corn the tomato is red the corn is yummy red is the tomato

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?