Solving Trigonometric Equations Involving Multiple Angles 6.3. JMerrill, 2009. Strategies for Solving Trig. Equations with Multiple Angles. If the equation involves functions of 2x and x, transform the functions of 2x into functions of x by using identities
cos 2x = cos x
All of the previous examples were solved for x. Now we’ll solve for 2x directly.
Pretend the 2 isn’t in front of the x and solve it (solve sin x = ½ )