Question

Cos 60º-sin 120⁰ ctg30⁰ + tg180⁰ /ctg45⁰

Answer 1

Ответ:

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Answer 2

Let's break down the given expression step by step:

1. Cos 60º: The cosine of 60º is equal to 0.5.
2. Sin 120º: The sine of 120º is equal to √3/2 (or approximately 0.866).
3. Ctg 30º: The cotangent of 30º is equal to √3 (or approximately 1.732).
4. Tg 180º: The tangent of 180º is equal to 0.
5. Ctg 45º: The cotangent of 45º is equal to 1.

Now we can substitute these values into the expression:

0.5 - (√3/2) * (1.732) + 0 / 1

Next, we can simplify the expression:

0.5 - (√3/2) * (1.732) + 0 / 1 = 0.5 - 1.732 + 0 = -1.232

Therefore, the value of the expression is approximately -1.232.