Homework Statement
Use the algebraic method to write √2 sin x - √2 cos x in the form
kcos(x + ϕ) where k>0, 0≤ ϕ ≤ 2π
Homework Equations
auxiliary form??
The Attempt at a Solution
my working out:
1st:
A= √2 B= -√2
K = √a^2 + b^2
= √(√2)^2 + (-√2)^2
= √2+2 = √4 =...