A triangle has a base of two to the third power units and a height of chicken fourth power units what is the area of the triangle

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

This is so hard and it’s for a test

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site