Question

cos-(cos#+cos#)/1+cos#.cos#)

Answer 1

Pythagorean identities. In trigonometry, the basic relationship between the sine and the cosine is given by the Pythagorean identity: where sin2 θ means (sin(θ))2 and cos2θ means (cos(θ))2. This can be viewed as a version of the Pythagorean theorem, and follows from the equation x2 + y2 = 1 for the unit circle.

Answer 2

Answer:

a right angled triangle, the cosine of an angle is: The length of the adjacent side divided by the length of the hypotenuse. The abbreviation is cos. cos(θ) = adjacent / hypotenuse.