Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

Cos 390 degrees is the value of cosine trigonometric function for an angle equal to 390 degrees. Understand methods to find the value of cos 390 degrees with examples and FAQs.

Use our cos(x) calculator to find the cosine of 390 degrees - cos(390 °) - or the cosine of any angle in degrees and in radians.

What is the value of cos(390) ? The value of cos(390) is (sqrt(3))/2 Detailed step by step solution for cos(390) Solutions. Integral Calculator Derivative Calculator Algebra Calculator Matrix Calculator More... Graphing. Line ...

Feb 17, 2017 · The cos of 390 degrees is 0.86603, the same as cos of 390 degrees in radians. To obtain 390 degrees in radian multiply 390° by $\pi$ / 180° = 13/6 $\pi$. Cos 390degrees = cos (13/6 × $\pi)$.

How do you find the value of cos(−90) ? How do you evaluate cos315 ? This is how we do it: Explanation: \displaystyle {\cos { {\left ( {315}\right)}}} \displaystyle= {\cos { {\left ( {360}- {45}\right)}}} \displaystyle= {\cos { {45}}} (as cos is positive in 4th ...

Apr 3, 2024 · By reducing 390 degrees to 390 - 360 = 30 degrees, we locate the angle in the first quadrant (Quadrant I) where both the sine and cosine values are positive.

Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.

To find the value of cos 390 degrees, we need to convert 390 degrees to radians using the formula we discussed earlier: Radians = (Degrees * π) / 180. For cos 390 degrees: Radians = (390 * π) / 180. Simplifying the equation, we can further write it as: Radians = (13/3)π.

\int e^x\cos (x)dx \int_{0}^{\pi}\sin(x)dx \sum_{n=0}^{\infty}\frac{3}{2^n} Show More