True or false: sinxcosy=1/2(sin(x+y)-cos(x+y))

My math teacher told my class to "steal" a 6th grade fraction word problem from the internet, word problems? : -p requirements: only a 1 step word problem. needs to be complex.

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16