Question

Asked Oct 27, 2019

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Use an Addition or Subtraction Formula to simplify the equation.

cos(θ) cos(2θ) + sin(θ) sin(2θ) = square root of 3 over 2

B) Find all solutions in the interval [0, 2π).

Step 1

Given equation is

Step 2

Here, we use the identity cosxcosy+sinxsiny=cos(x-y)

Step 3

Since cos(pi/6)=sqrt(3)/2 and value of cosine is posi...

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