The sine value of 120 degrees is equal to 0.866, rounded to the third decimal. This value is equal to the square root of 3 divided by 2.
Know MoreValues for trigonometric functions at specific angles are found through the unit circle. This mathematical device equates the values of sine and cosine, the other basic trigonometric functions, to specific important angles. Regardless of the position on the unit circle, the value of both basic functions always lies between negative 1 and positive 1. The unit circle also works in radians, which is a common mode on many calculators. In radians, 120 degrees is equal to 2(pie)/3, where pie is approximately 3.14.
Learn more about AlgebraThe sine of a 30-degree angle is 0.5. The sine is defined as the length of the side of the triangle opposite the angle in question divided by the length of the hypotenuse. These lengths can be determined through the Pythagorean theorem.
Full Answer >In mathematics, linear refers to an equation or function that is the equation of a straight line and takes the form y = mx + b, where "m" is equal to the slope, and "b" is equal to the y-intercept. Three features define a function as linear, but if a function satisfies one of the three requirements, then it satisfies them all and can be classified as linear.
Full Answer >The derivative of 5/x is equal to negative five divided by x squared. Using mathematical notation, the expression is written as d/dx 5/x = -5/x^2.
Full Answer >Since one kWh is equal to 3,412 BTU, to convert BTU to kWh, simply divide the number of BTUs by 3,412, according to Think Energy Management. Alternatively, multiply BTUs by 0.000293 or 1/3,412, according to Stovesonline.com. Reverse the calculation to convert kWh to BTU by multiplying the number of kWh by 3,412.
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