What are the multiples of -11 and 11

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

With alll of except for the 2 that i did already

Drag each expression to the correct location on the solution. not all expressions will be used. consider the polynomial 8x + 2x2 - 20x - 5. factor by grouping to write the polynomial in factored form.