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Are The sine and cosine of acute angles equal?
The sine and cosine of acute angles are equal only for 45° sin45° = cos 45° = 1/sqrt(2) = 0.7071
If the only information given about an oblique triangle is the lengths of the three sides which method should you use to solve for the angles?
By using the cosine rule in trigonometry the angles of the triangle can be worked out.
If two angles have the same angle measure then they are said to be .?
Congruent angles (or equivalent angles) have the same angle measure.
What are Same side exterior angles?
they are the opposite of same side interior angles
What are sine and cosine functions?
Sine allows us to find out what a third side or an angle is using the equation sin(x) = opposite over hypotenuse (x being the angle). Cosine has the same function but instead uses the equation cosine(x)= opposite over adjacent
How do you work out the angles in a triangle with only 3 sides and no angles?
use the inverse sine or cosine or tangent
What is an inverse cosine?
The inverse of the cosine is the secant.
The inverse of the cosine function?
The inverse of the cosine is the secant.
Is the inverse cosine of 0.55?
The inverse if cosine 0.55 is 0.55
What is cosine inverse of pi?
udefined
What is the inverse of the cosine function?
The inverse of the cosine function is arcosine. The domain is −1 ≤ x ≤ 1 since the range of the cosine function is from -1 to 1. The range is from 0 to pi radians or 0 to 180 degrees.
What is an arccosh?
An arccosh is the inverse hyperbolic cosine function.
What does csc stand for on a calulator?
Cosecant, or the inverse of the cosine.
Why are cosines positive and negative?
Because the cosine of some angles is positive and the cosine of some other angles is negative.
What is reciprocal in trigonometry?
The inverse of sine (sin) is cosecant (csc). The inverse of cosine (cos) is secant (sec). The inverse of tangent (tan) is cotangent (cot).
Where is arcosine on a TI-84 calculator?
It is labeled as "cos-1" on the calculator. But arcosine and inverse cosine are just two names for the same thing.
How do you find the angle of a cosine?
You mean, you have the cosine, and want the angle? That is called arc-cosine, often written as cos-1x. Your scientific calculator should have a "shift" key or something similar, which you press, followed by the cosine key. That will give you the inverse cosine or arc-cosine.
