Choose all of the options that are equal to sirt (-A)*
o
sin(A)
0 -sin (A)
cos ( 90 + A)
O cos ( 90 - A)
o 1-cos (A) +6
0 -sin (180 + A)

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.