To solve this equation, you must first put the equation in terms of cosx.
3cosx=2
cosx = 2/3
Next, you find the reference angle (α) by finding the cos inverse of 2/3.
α=cos-1(2/3) = 48.19 Degrees (approximately)
find the distance from from 48.19 and 90 you then add the difference to 270 giving you the two answers which are ... 48.19 and 311.81 (approximately)
Chat with our AI personalities