Question

4cos90°+2cos180° Сколько будет?

Answer 1

-2. Решение задания приложено

Answer 2

cos(90°) = 0, and cos(180°) = -1, so we can substitute these values into the expression to get:

4cos(90°) + 2cos(180°) = 4(0) + 2(-1) = 0 - 2 = -2

Therefore, 4cos(90°) + 2cos(180°) equals -2.