Hi there I would like to know how to do the following questions without drawing a graph. What is the formula?
The question: Express each of the following in terms of the cosine of another angle between 0° and 180°
a) cos 20°
b) cos 85°
Thank you for any help!
The question: Express each of the following in terms of the cosine of another angle between 0° and 180°
a) cos 20°
b) cos 85°
Thank you for any help!