Use the following identity:
cos(2x)=1-2sin^2(x)
1/36+1/36=2/36. why? because their are 6 sides. you must multiply. and for each dice ylu have a possibilty of 1/36.
Step-by-step explanation:
1/5 + 3/5 = 3/5 + 1/5 = 4/5
I am not sure what your teacher wants to see on the right side of the second equation.
it would be the whole equation again :
4/5 = 1/5 + 3/5 = 3/5 + 1/5
