Cosine Worksheets

What is the Trigonometric Function Cosine? Notice right angle triangle. Angle's Cosine= length of the close to side A. Length(L) of A(side)/(L) of the hypotenuse(H). Draw triangle's each vertex and observes how you will estimate Cosine A & C. The Cosine function is the most usual trigonometric functions. In a right-angled triangle, angle Cosine = A(adjacent side) / L of H. Short form of Cosine is cos, and its formula will be: Cos x = (A)(H). Here always the CAH means: Cosine is adjoint(A) over hypotenuse(H). E.g., You have to find Cosine of triangle angle C, and you know Cosine = angle side of the triangle (A) and Cosine / (H). Then, you will assume the value that will be: (A) is the side of Length = 26, (H of Length) = 30. Now, the formula will be like this: Cos (C) = 26 / 30. Then, you will divide the values as mentioned above. You will get the answer that is 0.8666. Hence, The Cosine of 30° is equal to 0.8666. In a mathematical form: Cos 30 = 0.8666. Use calculator for Cosine of 30° and you must have 0.8666. Only make sure the calculator must be in degrees, not in radians.