Question

5sin 30° + 2cos 180° Решение

Answer 1

Ответ:

5sin30°+2cos180°

5x1/2+2×(-1)

5/2-2

1/2

Answer 2

To solve the expression, let's evaluate each term separately:

1. sin 30°: The sine of 30° is equal to 0.5. Therefore, 5sin 30° = 5 * 0.5 = 2.5.

2. cos 180°: The cosine of 180° is equal to -1. Therefore, 2cos 180° = 2 * (-1) = -2.

Now, let's substitute the values back into the original expression:

5sin 30° + 2cos 180° = 2.5 + (-2) = 2.5 - 2 = 0.5.

Therefore, the solution to the expression 5sin 30° + 2cos 180° is 0.5.