Brians kite is flying above a field at the end of 65 m string. if the angle of elevation to the kite is 70°. how high is the kite above brians head assuming brians hands is at head height

61.08 m

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.