This can be done on a graphing calculator by making sure you have your calculator in degrees mode, and then tentering the cos(23). You get an answer of 0.9205048535.
Cosine is 0.5
As a decimal: 0.866 As a fraction: √(3)/2
Fora right angle triangle: cosine angle = adjacent/hypotenuse
The cosine of theta is adjacent over hypotenuse, given a right triangle, theta not being the 90 degree angle, adjacent not being the hypotenuse, and theta being the angle between adjacent and hypotenuse. In a unit triangle, i.e. in a unit circle circumscribed with radius one, and theta and the center of the circle at the origin, cosine of theta is X.
To find the cosine of an angle in degrees using a calculator, first ensure that the calculator is set to degree mode (not radians). Enter the angle in degrees, then press the "cos" button. The calculator will display the cosine value for that angle. For example, to find cos(60°), input 60, select "cos," and the result will be 0.5.
cosine(59 degrees) = 0.51504 (rounded)
Cosine is 0.5
at a 45 degree angle, or pi/4
45 degree
cos(50) = 0.6428 (rounded)
Cos(65 deg) = 0.4226 approx.
As a decimal: 0.866 As a fraction: √(3)/2
Find the cosine of 38 degrees and then find its reciprocal.
The number 1.414... (square root of 2) is two times the cosine or sine of a 45 degree angle. The reason for this is that for a 45 degree angle, the two sides are cosine and sine, they are equal, and if you solve using the Pythagorean theorem with a hypotenuse of 1, the two sides are each (21/2)/2.
The shrink constant, often referred to in the context of trigonometric functions, can be calculated using the cosine of the angle. For an angle of 15 degrees, the shrink constant is equal to the cosine of 15 degrees, which is approximately 0.9659. This means that an object or dimension shrinks to about 96.59% of its original size when projected at a 15-degree angle.
Fora right angle triangle: cosine angle = adjacent/hypotenuse
The cosine function is mathematical equation to determine the adjacent angle of a triangle. The cosine of an angle is the ratio of the length of the hypotenuse: so called because it is the sine of the co-angle.