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leothesupreme wrote:
Um... Hii! I am leo.
Is there any guys who know sin and Cosin?
Sine and cosine are two of the three main trigonometric functions, and are defined by a right angled triangle. For a given angle of the triangle, say theta we can find the sine and cosine of that triangle by using the respective formulae: Sin(theta) = Opposite/Hypotenuse and Cos(theta) = Adjacent/Hypotenuse.
A commonly used mnemonic is SOH CAH TOA (S=O/H, C=A/H and T=O/A). The TOA is just the tangent function, namely opposite divided by adjacent. You can view this song if you wish:
https://www.youtube.com/watch?v=PIWJo5uK3Fo
^^^ Not embed format!
Fun fact (for curious budding linguists): sine came from the Latin word, "sinus," meaning to curve or bend rather than the Latin word, "sine" (which literally translates as "without"). Similarly, cosine came from "cosinus," an abbreviation for the sine of a complementary angle.
More can be found here:https://hsm.stackexchange.com/questions/5258/what-is-the-etymology-behind-sine-cosine-tangent-etc
Aug 14, 2020
0
#5
DifferentialGalois wrote:
leothesupreme wrote:
Um... Hii! I am leo.
Is there any guys who know sin and Cosin?
Sine and cosine are two of the three main trigonometric functions, and are defined by a right angled triangle. For a given angle of the triangle, say theta we can find the sine and cosine of that triangle by using the respective formulae: Sin(theta) = Opposite/Hypotenuse and Cos(theta) = Adjacent/Hypotenuse.
A commonly used mnemonic is SOH CAH TOA (S=O/H, C=A/H and T=O/A). The TOA is just the tangent function, namely opposite divided by adjacent. You can view this song if you wish:
https://www.youtube.com/watch?v=PIWJo5uK3Fo
^^^ Not embed format!
another way is to use the unit circle, which can be easily seen to be the same definition, actually
Um... Hii! I am leo.
Is there any guys who know sin and Cosin?