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What is cosine 0?
Cosine 0 is 1
What is the domain of the cosine function?
-1<cosine<1
What is the cosine of a 60 degree angle?
Cosine is 0.5
What is the formula for the y-intercept of a cosine function?
The Y-Intercept of the cosine function is X = 0, Y = cosine(0) = 1.
What is the cosine of 0.57?
The cosine of 0.57 degrees is 0.999951. The cosine of 0.57 radians is 0.841901
How is the cosine rule derived?
the cosine rule is derived from the division of the adjacent side & hypotenuse
How does one differentiate between the sine rule and the cosine rule?
The sine rule is a comparison of ratios: (sin A)/a = (sin B)/b = (sin C)/c. The cosine rule looks similar to the theorem of Pythagoras: c2 = a2 + b2 - 2ab cos C.
What proportion do you use to find the length of the third side triangle XYZ?
The answer depends on the information that you have: it could be the sine rule or the cosine rule.
Is it is necessary to be a right angle triangle to use sine rule?
No. Sine rule (and cosine rule) apply to all triangles in Euclidean space (plane geometry). A simplification occurs when there is a right angle because the sine of the right angle is 1 and the cosine is 0. Thus you get Pythagoras theorem for right triangles.
How are all three versions of the law of cosines correct?
It follows from the cyclical symmetry of the cosine rule.
What is cosine cubed?
It is cosine*cosine*cosine.
