The exact value of cos(0) cos (0) is 1 1. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step …

0.78 Explanation: Use calculator. Press --> 38.3 --> cos --> 0.78 cos (38.3) = 0.78

0.78 Explanation: Use calculator. Press --> 38.3 --> cos --> 0.78 cos (38.3) = 0.78

Apply the periodicity of cos: cos (x + 2 π ⋅ k) = cos (x) cos (2 π ⋅ 5 + 0) = cos (0) = cos (0) = cos ( 0 ) Use the following trivial identity: cos ( 0 ) = 1

What is the value of cos ( (10pi)/4) ?

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。

Make the expression negative because cosine is negative in the third quadrant. The exact value of cos(π 3) cos (π 3) is 1 2 1 2. The result can be shown in multiple forms. Free math problem …

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Use our cos (x) calculator to find the cosine of π/10 radian (s) - cos (pi/10 rad) - or the cosine of any angle in degrees and in radians.