The exact value of cos(30) cos (30) is √3 2 3 2. The result can be shown in multiple forms. 0.86602540… 0.86602540 … Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a …

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.

cos\left(390\right) en. Related Symbolab blog posts. Practice, practice, practice. Math can be an intimidating subject. Each new topic we learn has symbols and problems we have never seen. The unknowing...

2015年6月3日 · How do you find the six trigonometric functions of 390 degrees? The ratios of 390 are the same as the ratios of 30°. sin390 = sin(30 +360) = sin30 = 1 2. cos390 = cos(30 + 360) = cos30 = √3 2. tan390 = tan30 = 1 √3 = √3 3. cot390 = 1 tan30 = √3 1. sec390 = 1 cos30 = 2 √3. csc390 = 1 sin30 = 2 1.

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.

2017年2月17日 · 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 ...

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.

To find the value of cos (39 0 ∘), we can use the periodic property of the cosine function. The cosine function has a period of 36 0 ∘, which means cos (θ) = cos (θ + 36 0 ∘). Therefore, we can reduce the angle 39 0 ∘ by subtracting 36 0 ∘ to find an …

Apply the periodicity of cos: cos (x + 36 0 ∘) = cos (x) cos (36 0 ∘ + 3 0 ∘) = cos (3 0 ∘) = cos (3 0 ∘) = cos ( 3 0 ∘ ) Use the following trivial identity: cos ( 3 0 ∘ ) = 2 3