Somebody help me with this

30 points ☺️

Do 12/14 and 8/10 have the same value? explain your answer.

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

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.