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Answers
Step-by-step explanation:
Cos 20 Degrees
The value of cos 20 degrees is 0.9396926. . .. Cos 20 degrees in radians is written as cos (20° × π/180°), i.e., cos (π/9) or cos (0.349065. . .). In this article, we will discuss the methods to find the value of cos 20 degrees with examples.
Cos 20°: 0.9396926. . .
Cos (-20 degrees): 0.9396926. . .
Cos 20° in radians: cos (π/9) or cos (0.3490658 . . .)
What is the Value of Cos 20 Degrees?
The value of cos 20 degrees in decimal is 0.939692620. . .. Cos 20 degrees can also be expressed using the equivalent of the given angle (20 degrees) in radians (0.34906 . . .)
We know, using degree to radian conversion, θ in radians = θ in degrees × (pi/180°)
⇒ 20 degrees = 20° × (π/180°) rad = π/9 or 0.3490 . . .
∴ cos 20° = cos(0.3490) = 0.9396926. .