Question

Sind-cos2d-cos3d при d=30°

Answer 1

Sin30°-cos2*30°-cos3*30°=1/2-1/2-√3/2=

=-√3/2

Answer 2

To calculate the value of sin(d) * cos(2d) * cos(3d) when d = 30°, you need to convert the angle from degrees to radians, as most mathematical functions expect angles to be in radians.

1 degree (°) is equal to π/180 radians. Therefore, to convert 30° to radians:

d = 30° * (π/180) ≈ 0.5236 radians

Now, you can compute the value of sin(d) * cos(2d) * cos(3d):

sin(d) = sin(0.5236) ≈ 0.5 cos(2d) = cos(2 * 0.5236) = cos(1.0472) ≈ 0.5 cos(3d) = cos(3 * 0.5236) = cos(1.5708) ≈ 0

Finally:

sin(d) * cos(2d) * cos(3d) ≈ 0.5 * 0.5 * 0 ≈ 0

So, when d = 30°, the value of sin(d) * cos(2d) * cos(3d) is approximately 0.