Question

Cos30°+tg30°=? Срочно, пожалуйста!

Answer 1

Вроде:
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Answer 2

Calculation of cos(30°) and tg(30°)

To calculate the values of cos(30°) and tg(30°), we can refer to trigonometric identities and formulas.

1. cos(30°): The cosine of an angle is defined as the ratio of the length of the adjacent side to the hypotenuse in a right triangle. For a 30° angle, we can consider a right triangle with angles 30°, 60°, and 90°.

In a 30°-60°-90° triangle, the sides are in the ratio 1:√3:2. The adjacent side to the 30° angle is the shorter leg, which has a length of 1. The hypotenuse has a length of 2.

Therefore, cos(30°) = adjacent side / hypotenuse = 1/2.

2. tg(30°): The tangent of an angle is defined as the ratio of the length of the opposite side to the adjacent side in a right triangle.

In the same 30°-60°-90° triangle, the opposite side to the 30° angle is the longer leg, which has a length of √3. The adjacent side has a length of 1.

Therefore, tg(30°) = opposite side / adjacent side = √3/1 = √3.

So, the values are: - cos(30°) = 1/2 - tg(30°) = √3

Please note that these values are exact values and do not require any further approximation.

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