Question

Cos 126cos 36 +sin 126 sin 36=

Answer 1

Ответ:

решение смотри на фотографии

Пошаговое объяснение:

Answer 2

To simplify the expression cos(126°)cos(36°) + sin(126°)sin(36°), you can use the trigonometric identity for the cosine of the difference of two angles:

cos(A - B) = cos(A)cos(B) + sin(A)sin(B)

In your case, A = 126° and B = 36°. So, you have:

cos(126° - 36°)

Now, subtract the angles:

cos(90°)

The cosine of 90 degrees is 0. Therefore, the simplified expression is:

0