Question

Calculate the length of AD in the shape below
Give your answer to 1.d.p

Answer 1

Set your calculator to degree mode.

cos(35°) = 4/AC

ACcos(35°) = 4

AC = 4/cos(35°)

AD =

√(6² + (4/cos(35°))² - 6(4/cos(35°))cos(59°)) = about 6.7 cm