Webwork, TrigEquations, Problem #5

Find the principal root of this equation:

Tan(x) – 1 = 0

Tan(x) – 1 = 0
+1                  +1

Tan(x) = 1

(Tan-1 )Tan(x) = 1 (Tan-1 )

x = 45°

x = π/4

The Principal Root of this equation is π/4

0