Cos 40 degrees in radians is written as cos (40° × π/180°), i.e., cos (2π/9) or cos (0.698131. . .). In this article, we will discuss the methods to find the value of cos 40 degrees with examples.

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The three basic trigonometric functions are: Sine (sin), Cosine (cos), and Tangent (tan). What is trigonometry used for? Trigonometry is used in a variety of fields and applications, including geometry, calculus, engineering, and physics, to solve …

Let's take 40° as an example. Keep calm and read the result – in our case, cos (40°) ≈ 0.766 (remember, it's an approximate value; an exact cosine value can be found only for specific cases). Give this cosine calculator a go! Play around by typing the cosine value and finding the angle.

k = ...,-2,-1,0,1,2,... Cosine calculator online. cos (x) calculator.

Use our cos(x) calculator to find the cosine of 40 degrees - cos(40 °) - or the cosine of any angle in degrees and in radians.

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

Use this cos calculator to easily calculate the cosine of an angle given in degrees or radians. The cosine is encountered in geometry problems involving right triangles, circles, and others where cos(x) can be calculated.

Feb 17, 2017 · The cos of 40 degrees is 0.76604, the same as cos of 40 degrees in radians. To obtain 40 degrees in radian multiply 40° by $\pi$ / 180° = 2/9 $\pi$. Cos 40degrees = cos (2/9 × $\pi)$.