Question

2ctg(-п/6)*tg п/3 +cosп-2sin п/4

Answer 1

Ответ:

Объяснение:

2ctg(-п/6)*tg п/3 +cosп-2sin п/4=-2ctg(П/6)*√3-1-2*√2/2=

=-2√3*√3-1+√2=-2*3-1+√2=(√2)-7

Answer 2

It seems like you've provided a mathematical expression, but there might be some errors or missing parentheses in your input. I'll do my best to interpret it and simplify it for you:

1. First, let's correct the trigonometric function notations. "п" should be replaced with the Greek letter "π" (pi).

So the expression becomes:

2 * tan(-π/6) * tan(π/3) + cos(π) - 2 * sin(π/4)

2. Now, let's evaluate the trigonometric functions:

tan(-π/6) = -√3/3 tan(π/3) = √3 cos(π) = -1 sin(π/4) = √2/2

3. Substitute these values into the expression:

2 * (-√3/3) * (√3) + (-1) - 2 * (√2/2)

4. Simplify further:

-2√3 + (-1) - √2

5. Combine like terms:

-2√3 - √2 - 1

So, the simplified value of the expression is:

-2√3 - √2 - 1