Question

Cos36°×Cos24°-Sin36°×Sin24°

Answer 1

Объяснение:

Это формула косинус суммы: Cos36°×Cos24°-Sin36°×Sin24°=Cos(36+24)=Cos60=0.5

Answer 2

You can calculate the value of the expression "Cos(36°) × Cos(24°) - Sin(36°) × Sin(24°)" using trigonometric identities, specifically the angle difference identity for cosine:

Cos(A - B) = Cos(A) × Cos(B) + Sin(A) × Sin(B)

In your case, A = 36° and B = 24°. Therefore:

Cos(36° - 24°) = Cos(12°)

So, the expression becomes:

Cos(12°)

You can use a calculator or a table of trigonometric values to find the cosine of 12 degrees. It is approximately equal to 0.84385.