Cosine is one of the basic function used in trigonometry. In the right angled triangle, the cosine of the angle can be found by dividing the length of the adjacent side by the length of the hypotenuse. It is simply also abbreviated as 'cos'. It is the ratio of the side adjacent to a given angle to the hypotenuse. Simple trigonometric cosine penta angle calculator which is used to find the penta angle of cosine with the given alpha value. Enter Alpha value to find the cosine fifth angle.
If α is 60 degrees, then Cosine Penta Angle?
cos5α = 16 cos5α - 20 cos3α + 5 cosα
= 16 cos560 - 20 cos360 + 5 cos60
= 0.5 °