Question

Чему равен cos145 градусов ?

Answer 1

Cos145=-0,8191. По таблице брадиса

Answer 2

Косинус cos 145 градусов = -0.8191520443.

cos145= cOS(180-145)=35
а cos35=-0.81915 округляя получим что cos 145 приближенно равен -0,8

Answer 3

Calculation of cos(145 degrees)

To calculate the value of cos(145 degrees), we can use the trigonometric identity that relates the cosine of an angle to the cosine of its supplementary angle. The supplementary angle of 145 degrees is 180 degrees minus 145 degrees, which is 35 degrees.

Therefore, we can rewrite cos(145 degrees) as cos(180 degrees - 145 degrees), which is equivalent to cos(35 degrees).

Using a calculator or trigonometric table, we can find that the value of cos(35 degrees) is approximately 0.8192.

So, cos(145 degrees) is approximately equal to 0.8192.