How do you find the value of cos 40?

The value of cos 40 degrees can be calculated by constructing an angle of 40° with the x-axis, and then finding the coordinates of the corresponding point (0.766, 0.6428) on the unit circle. The value of cos 40° is equal to the x-coordinate (0.766). ∴ cos 40° = 0.766.

What is the exact value of sin 40?

Sin 40 degrees is the value of sine trigonometric function for an angle equal to 40 degrees. The value of sin 40° is 0.6428 (approx).

What is the complement of Cos 40?

Because only one of the answers can be correct, look for the simplest relationship (complementary angles): 50° is complementary to 40°, so cos 40° = sin 50°, which means (A) is correct.

How do you find the value of cos 20?

The value of cos 20 degrees can be calculated by constructing an angle of 20° with the x-axis, and then finding the coordinates of the corresponding point (0.9397, 0.342) on the unit circle. The value of cos 20° is equal to the x-coordinate (0.9397). ∴ cos 20° = 0.9397.

How do you find the value of cos 27?

The value of cos 27 degrees can be calculated by constructing an angle of 27° with the x-axis, and then finding the coordinates of the corresponding point (0.891, 0.454) on the unit circle. The value of cos 27° is equal to the x-coordinate (0.891). ∴ cos 27° = 0.891.

Find Exact value of cos20 cos40 cos 60 cos 80

How do you find the value of cos 70?

The value of cos 70 degrees can be calculated by constructing an angle of 70° with the x-axis, and then finding the coordinates of the corresponding point (0.342, 0.9397) on the unit circle. The value of cos 70° is equal to the x-coordinate (0.342). ∴ cos 70° = 0.342.

What is the value of cos 45 in trigonometry?

The approximate value of cos 45 is equal to 0.7071. Therefore, 0.7071 or 1/√2 is a value of a trigonometric function or trigonometric ratio of standard angle (45 degrees).

How do you solve cos 30 degrees?

How to Find the Value of Cos 30 Degrees? The value of cos 30 degrees can be calculated by constructing an angle of 30° with the x-axis, and then finding the coordinates of the corresponding point (0.866, 0.5) on the unit circle. The value of cos 30° is equal to the x-coordinate (0.866). ∴ cos 30° = 0.866.

How do you find the value of cos 50?

The value of cos 50 degrees can be calculated by constructing an angle of 50° with the x-axis, and then finding the coordinates of the corresponding point (0.6428, 0.766) on the unit circle. The value of cos 50° is equal to the x-coordinate (0.6428). ∴ cos 50° = 0.6428.

How do you find cosine without a calculator?

The hypotenuse is the square root of 2, and the other two sides are 1. So if you are asked to find the cosine of 60 degrees, you would draw the 30-60-90 triangle and notice that the adjacent side is 1 and the hypotenuse is 2. Therefore, the cosine of 60 degrees is 1/2.

How do you find cos 90?

The value of cos 90 degrees can be calculated by constructing an angle of 90° with the x-axis, and then finding the coordinates of the corresponding point (0, 1) on the unit circle. The value of cos 90° is equal to the x-coordinate (0). ∴ cos 90° = 0.

What is cos equation?

Then the cosine formula is, cos x = (adjacent side) / (hypotenuse), where "adjacent side" is the side adjacent to the angle x, and "hypotenuse" is the longest side (the side opposite to the right angle) of the triangle.

What is the exact value of cos 25?

The value of cos 25° is equal to the x-coordinate (0.9063). ∴ cos 25° = 0.9063.

How do you find the value of sin 42?

The value of sin 42 degrees can be calculated by constructing an angle of 42° with the x-axis, and then finding the coordinates of the corresponding point (0.7431, 0.6691) on the unit circle. The value of sin 42° is equal to the y-coordinate (0.6691). ∴ sin 42° = 0.6691.

How do you find the value of cos 35?

The value of cos 35 degrees can be calculated by constructing an angle of 35° with the x-axis, and then finding the coordinates of the corresponding point (0.8192, 0.5736) on the unit circle. The value of cos 35° is equal to the x-coordinate (0.8192). ∴ cos 35° = 0.8192.

What is value of cos 60 degree?

The value of cos 60 is 1/2.

What is the value cos 30?

Cos 30° = √3/2 is an irrational number and equals to 0.8660254037 (decimal form). Therefore, the exact value of cos 30 degrees is written as 0.8660 approx. √3/2 is the value of Cos 30° which is a trigonometric ratio or trigonometric function of a particular angle.

How do you do cos 45 degrees on a calculator?

The value of cos 45 degrees can be calculated by constructing an angle of 45° with the x-axis, and then finding the coordinates of the corresponding point (0.7071, 0.7071) on the unit circle. The value of cos 45° is equal to the x-coordinate (0.7071). ∴ cos 45° = 0.7071.

How do you find the value of cos 135 degrees?

The value of cos 135 degrees can be calculated by constructing an angle of 135° with the x-axis, and then finding the coordinates of the corresponding point (-0.7071, 0.7071) on the unit circle. The value of cos 135° is equal to the x-coordinate (-0.7071). ∴ cos 135° = -0.7071.

What is the value of cos Square 45 degree?

cos^2 45 = 1/2.

How do you find the value of cos 10?

The value of cos 10° is equal to the x-coordinate (0.9848). ∴ cos 10° = 0.9848.

How do you find the value of cos 80?

The value of cos 80 degrees can be calculated by constructing an angle of 80° with the x-axis, and then finding the coordinates of the corresponding point (0.1736, 0.9848) on the unit circle. The value of cos 80° is equal to the x-coordinate (0.1736). ∴ cos 80° = 0.1736.

How do you find the value of cos 75?

The value of cos 75 degrees can be calculated by constructing an angle of 75° with the x-axis, and then finding the coordinates of the corresponding point (0.2588, 0.9659) on the unit circle. The value of cos 75° is equal to the x-coordinate (0.2588). ∴ cos 75° = 0.2588.