Problema Solution
In ∆ABC, a = 3 centimeters, c = 4 centimeters, and m B = 135°. What is AC to two decimal places?
Answer provided by our tutors
let
a = 3 cm
c = 4 cm
mB = 135
we need do find AC = b
according to Low of Cosines we have
b^2 = a^2 + c^2 - 2ac(cos mB)
b^2 = 3^2 + 4^2 - 2*3*4*(cos 135)
by solving the equation we find
b = 6.48 cm
click here to see the step by step solution of the equation
AC is 6.48 cm.