Convert the following degree measure to radian measure 45 degrees

Use the equivalence 180∘=π rad
180
∘
=
π
rad
. Then you can say that 45∘180∘=x radπ rad
45
∘
180
∘
=
x
rad
π
rad
, so x=45∘⋅π rad180∘=π4 rad≈0.785 rad

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.