Question

1)Sin43градусов-sin13град=. 2) cos5град-cos15град=. 3)cos27альфа+cos17альфа=

Answer 1

Решение задания смотри на фотографии

Answer 2

To calculate the trigonometric expressions, we can use the trigonometric identities and a calculator. Keep in mind that I can't provide real-time calculations, so I'll use approximate values for the trigonometric functions.

1. sin(43 degrees) - sin(13 degrees) ≈ 0.6763 - 0.224951 = 0.451349

2. cos(5 degrees) - cos(15 degrees) ≈ 0.996195 - 0.965926 = 0.030269

3. cos(27 alpha) + cos(17 alpha)

Since alpha is a variable and not a specific value, we cannot calculate the exact result without knowing the value of alpha. We would need to have a specific value for alpha to evaluate this expression.