Question

Dont understand how: 2-2sin^2x divided by 2 equals cos^2x ??
(^2 means squared)

Answer 1

2-2sin^2x divided by 2

is the same as

2/2 - (2sin^2x)/2

and that turns into

1 - sin^2x

Answer 2

does that help?

Answer 3

i see now: both numbers 2 in numerator cancel out with number 2 in denominator so you are left with 1 - 1sin^2x which is is cos^2x. thanks

Answer 4

yw