Question

Sin150+cos 175/tg250-ctg275

Answer 1

0,5+2,7+0,09=3.29
ну как то так

Answer 2

To solve this expression, let's break it down step by step.

1. Evaluate sin(150): sin(150) = sin(180 - 30) = sin(30) = 0.5

2. Evaluate cos(175): cos(175) = cos(180 - 5) = -cos(5) (cosine is an odd function) ≈ -0.9962

3. Evaluate tg(250): tg(250) = tan(250) (tangent and cotangent are reciprocal functions) However, the tangent function has a period of π (180 degrees), so we can subtract 180 from the angle: tg(250) = tan(70) ≈ 2.7474

4. Evaluate ctg(275): ctg(275) = 1 / tan(275) (cotangent is the reciprocal of tangent) Similarly, since cotangent also has a period of π, we subtract 180: ctg(275) = 1 / tan(95) ≈ 0.0652

Now, substitute the values into the expression:

(sin(150) + cos(175)) / (tg(250) - ctg(275))

= (0.5 + (-0.9962)) / (2.7474 - 0.0652)

= (-0.4962) / 2.6822

≈ -0.1849

Therefore, the value of the expression sin(150) + cos(175) / tg(250) - ctg(275) is approximately -0.1849.