Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cosine is negative in the second quadrant.

Cos 150 degrees is the value of cosine trigonometric function for an angle equal to 150 degrees. Understand methods to find the value of cos 150 degrees with examples and FAQs.

To find the exact values of cos 150° and sin 150°, we will use the trigonometric identity cos (180° - Θ) and sin (180° - Θ). Answer: The exact value of cos (150 ∘) is −√3/2 and sin (150 ∘) is 1/2. …

May 16, 2018 · First of all, observe that 150 = 180 −30. Then, remember that we have cos(180 − x) = − cos(x) sin(180 − x) = sin(x) Plug in x = 30 to get cos(180 − 30) = −cos(30) sin(180 − 30) …

Use our cos (x) calculator to find the cosine of 150 degrees - cos (150 °) - or the cosine of any angle in degrees and in radians.

Apr 12, 2019 · The exact value of cos150 is − 23. This value is determined by recognizing that 150 degrees is in the second quadrant, where cosine values are negative, and using the …

Find the value using the definition of cosine. Substitute the values into the definition. Divide − √3 2 - 3 2 by 1 1. The result can be shown in multiple forms. Exact Form: Decimal Form: …

Feb 26, 2017 · The cos of 150 degrees is -√ (3)/2, the same as cos of 150 degrees in radians. To obtain 150 degrees in radian multiply 150° by π / 180° = 5/6 π. Cos 150degrees = cos (5/6 × …

Apr 20, 2020 · Final answer: The value of cos (150°) is -0.866. Explanation: The value of cos (150°) can be determined using the unit circle or trigonometric ratios. Since 150° is in the …

In this lesson, we learned about the cosine (cos) function in trigonometry and specifically focused on evaluating cos 150 degrees. We started by reviewing the basic definitions of trigonometric …