Step 3: Determine the value of cos The cos-value is the opposite angle of the sin angle. To determine the value of cos divide by 4 in the opposite sequence of sin. For example, divide 4 by 4 under the root to get the value of cos 0°. See the example below. To determine the value of cos 0° Learn how to derive the value of cos 180 degree or pi, which is -1, using different methods and trigonometry tables. Find out the applications of trigonometry functions in various fields and test your knowledge with a quiz. The trigonometric table consists of values of trigonometric ratios – sine, cosine, tangent, cosecant, secant, and cotangent for different standard angles like 0, 30°, 45°, 60°, and 90°. www.fvtool.com has expired. If you are the owner, log in to Cloudflare for domain renewal options. Go to Cloudflare Dashboard