Book Maths Puzzle Algebra

how to factor (sin A)^3-(cos B)^3

and in this case: (sin x+cos x)(sin x-cos x) , can i take the x out or not ?

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Book Other Question

solve the system by graphing, use set notation to express the solution
1. 2x+2y=0
-x+y=6

2. 5x+10y=15
y=1/2x-3

Solve the system by substitution or the additi If i have a rectangle that is 122' by 96'. I am going to move the back right point 10' forward. The front left will be the pivot point. How much will the other points move forwa