It is noted that the value of Sec 30 will be reciprocal of Cos 30 value. Cos 30 Value Cos 30 degrees is written as cos 30 ° and has a value in fraction form as √3/2. Cos 30 ° = √3/2 Cos 30 ° = √3/2 is an irrational number and equals to 0.8660254037 (decimal form). Therefore, the exact value of cos 30 degrees is written as 0.8660 approx. The derivation of cos 30 ° is given below. How to Derive the Value of Cos 30 Degrees? The value of cos 30 degrees can be found in terms of different trigonometric functions like sine functions and cos functions with varying angles like 60°, 90°, etc., and also with the help of some other trigonometric sine functions. Use our cos (x) calculator to find the cosine of 30 degrees - cos (30 °) - or the cosine of any angle in degrees and in radians. The value of cos 30 degrees in fraction form is √3/2, and 0.8660254037 in decimal form. The cosine function is a periodic function used in trigonometry. Trigonometry is a branch of mathematics that deals with angles, their properties, and applications. In real-life problems, it is a function that connects the angles and sides of a right-angled triangle. It is used to figure out the value of an unknown angle or side. When determining the value of the unknown, many trigonometry formulas and ...
