please helpe me with this question

If cosa= A, cosy=B, sin x=C and siny=D, find an expression for sin(2x +y) which only involves A, B, C and D. Show and explain your work.Fill in the blanks with appropriate numbers. Suppose sin (@) = and x is in the interval Then cos(2) = and tan() = (Your answers should be fractions in reduced/simplified form.)Suppose a is in the interval 0, 7 , and it is not in the domain of tan(a) . What is cos(2x) ? (Use decimal notation in your answer.)Consider at) =4COS(L:) . What is f(601) ? Use decimal notation in your answer. (: What is the period of f '3) Consider the function x) 2 |:n 5| ||:rl7| . {a} Write the function f($) as a piece-wise dened function, where the pieces are linear functions. (That is, write at) using cases, as in Example 4 on page 6, but without using absolute values.) {bl Use part [a] to sketch the graph of the function (by hand)