Question

Cos 136 * cos 44 - sin 44 * sin 136

Answer 1

Есть такая формула : cos(α+-β) = cosα×cosβ +-sinα×sinβ. Из этого следует, что Cos 136 * cos 44 - sin 44 * sin 136 = cos 92°

Answer 2

To find the value of cos(136°) * cos(44°) - sin(44°) * sin(136°), 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 this case, A = 136° and B = 44°. So,

cos(136° - 44°) = cos(92°)

Now, you can calculate the value:

cos(92°) = cos(180° - 92°) = cos(88°)

So, cos(136°) * cos(44°) - sin(44°) * sin(136°) = cos(88°). You can use a calculator to find the numerical value of cos(88° if needed.