Question

Cos240°=sin 13п/6=tg300°=​

Answer 1

Ответ:

cos240°= минус одна вторая или -0.5

sin 13π/6 = одна вторая или 0.5

tg300°= -√3

Answer 2

It seems like you're asking about the trigonometric values of certain angles. Let's break down each of these:

1. cos(240°): The cosine function is negative in the third quadrant (180° to 270°). To find the cosine value of 240°, you can consider the reference angle in the first quadrant, which is 60°. The cosine of 60° is 0.5, but in the third quadrant, it's negative, so cos(240°) = -0.5.

2. sin(13π/6): The angle 13π/6 is in the fourth quadrant (270° to 360°). The reference angle in this case is 13π/6 - 2π = π/6. The sine of π/6 is 0.5, and since sine is positive in the fourth quadrant, sin(13π/6) = 0.5.

3. tan(300°): The tangent function is negative in the fourth quadrant. To find the tangent value of 300°, you can consider the reference angle in the first quadrant, which is 60°. The tangent of 60° is √3, and since tangent is negative in the fourth quadrant, tan(300°) = -√3.

Please note that radians and degrees are two different ways of measuring angles. π radians is equivalent to 180°. In the second calculation, you're using radians, and in the third calculation, you're using degrees. Make sure you're consistent in your calculations and units.