Question

in the interval 0 degrees x 360 find the values of x for which cos x=-0.4226

My teacher wants us to do this, but we haven't been taught it yet- istg I'm so stressed :(.

Answer 1

Answer:

245°

Step-by-step explanation:

The value of x within the interval are 115° and 245°Step-by-step explanation:Given the trigonometric equation;cos x =-0.4226To get the value of x within the range 0° < x < 360°, we need to take the arc cosine of the value as shown;x = arccos -0.4226x = 114.99°x ≈ 115°Since x is positive in the 4th quadrant, the value of x can also be 360 - where x2 = 360°-115°x2 = 245°