Plz help me with this questions thz

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

What is the total surface area of this square pyramid?

Revirite the formula to determine the area covered by one can of paint. alyssa and her father are going to paint the house this summer. they know they'll need 6 cans of paint. enter the correct answer. 000 done a formula that describes this scenario is (licierali 000 oo 6 w w = the total area of the walls p = area covered by a can of paint