Question

Cos 83 cos 23+ sin 83 sin 23

Answer 1

Объяснение:

cos 83° cos 23° + sin 83° sin 23° = cos (83° - 23°) = cos 60° = 1/2

Answer 2

Ответ:

cos 60

Объяснение:

Photomath

Answer 3

The expression you've provided is equivalent to the cosine of the difference between the angles 83 degrees and 23 degrees:

cos(83°) * cos(23°) + sin(83°) * sin(23°) = cos(83° - 23°)

To calculate the value of this expression, subtract 23 degrees from 83 degrees:

cos(83° - 23°) = cos(60°)

Now, you can find the cosine of 60 degrees, which is a well-known value:

cos(60°) = 0.5

So, the final result is:

cos(83°) * cos(23°) + sin(83°) * sin(23°) = 0.5