Two questions for now:
1. Simplify sin /1+cos * 1-sin^2 /cot .
I got as far as sin^2 cos /1 + cos . Is there any further i can go??
2. Simplify sin^3 -cos^3 /sin^2 -cos^2 .
Can i use difference and sum of cubes here to factorise or is this not possible?