Question

Ctg405-ctg(-405)/2sin(-750)=

Answer 1

Объяснение:

sin (-420°) = - 0.866025

cos (-750°) = 0.866025

tg (-405°) = - 1

2cos60°-tg π/4 = 0.986292

ctg45°-2sin π/6 = 1.98172

2cos30°·ctg60°-sin 3π/2 = 2.91784

ctg405°-ctg (-405°) : 2sin (-750°) = 0.75

Answer 2

The expression you provided is:

Ctg405 - ctg(-405) / (2sin(-750))

Before we evaluate the expression, let's clarify the notation:

• "Ctg" stands for the cotangent function.
• The subscript "405" and "-405" likely represent the angles in degrees.

To solve this expression, we need to convert the angles from degrees to radians since most trigonometric functions work with radians. The conversion formula is:

radians = degrees * (π/180)

Let's convert the angles:

405 degrees = 405 * (π/180) radians ≈ 7.079632679489661 radians -405 degrees = -405 * (π/180) radians ≈ -7.079632679489661 radians -750 degrees = -750 * (π/180) radians ≈ -13.08996938995729 radians

Now we can substitute the values into the expression:

Ctg(7.079632679489661) - Ctg(-7.079632679489661) / (2sin(-13.08996938995729))

Note: I've used the approximation of radians for ease of calculation.

To calculate the value, we need to use a calculator or a programming language that supports trigonometric functions.