The value of cos 155 degrees can be calculated by constructing an angle of 155° with the x-axis, and then finding the coordinates of the corresponding point (-0.9063, 0.4226) on the unit circle. The value of cos 155° is equal to the x-coordinate (-0.9063). ∴ cos 155° = -0.9063. How to Find Cos 155° in Terms of Other Trigonometric Functions?

为了在计算器上计算cos（x）： 输入输入角度。 在组合框中选择度数（°）或弧度（rad）的角度类型。 按 = 按钮计算结果。

Use our cos (x) calculator to find the cosine of 155 degrees - cos (155 °) - or the cosine of any angle in degrees and in radians.

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To calculate cos 155 degrees, we need to follow a step-by-step process. Step 1: Draw a right triangle with an angle of 155 degrees. Make sure to label the sides of the triangle: the side adjacent to the angle (A), the side opposite the angle (O), and the hypotenuse (H). Step 2: Identify the lengths of the sides of the triangle.

The cos of 155 degrees is -0.90631, the same as cos of 155 degrees in radians. To obtain 155 degrees in radian multiply 155° by π / 180° = 31/36 π. Cos 155degrees = cos (31/36 × π). Our results of cos155° have been rounded to five decimal places.

Calculate cos(155) cos is found using Adjacent/Hypotenuse. Determine quadrant: Since 90 155 180 degrees it is located in Quadrant II. sin is positive. Determine angle type: 155 > 90°, so it is obtuse. cos(155) = -0.90630778573025. Special Angle Values

2024年4月18日 · 本文介绍了三角函数sinx、cosx和tanx的基本概念，包括它们的图像特征、性质以及配套的练习题，帮助读者理解并掌握这些基本概念。 单调区间加 2kπ，对称轴加 kπ，这个确定的思路是，相同函数值，对应的 x 点之间的距离。 简便解法：将选项值代入，看看那个对应的 x1，x2，x3 复合条件即可。 利用cos (x) = 1 - x^2/2! + x^4/4! - x^6/6! + …… // x^2表示x的2次方 写 函数 mycos (double x)， 函数 返回值是利用上述公式得出的cos (x)，而不是调用math.h里 …

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Detailed step by step solution for cos(155)