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What else can I help you with?
When you have a right angle what does the law of cosines reduce to?
cosine = adjacent/hypotenuse
What are the formulas for law of sines and law of cosines?
sine: sin(A) sin(B) sin(C) cosines: a2=b2+c2-2bc cos(A).........----- = ----- = ------........,,,.a .......b........ ca is side BC A is angle A sin(A) means sine of angle Apsst, theres a law of tangents too, but its so complicated that im not gonna post it hereLaw of sine -A B C------ = ------ = ------Sin(a) Sin(b) Sin(c)
Sine and cosine of real numbers?
Putting a question mark at the end of a phrase does not make it a sensible of even an answerable question. Sine and cosine of real numbers? Yes, they do exist. In fact, sines and cosines of complex numbers also exist. Does that answer the question?
Can direction ratios be negative?
Yes, direction ratios can be negative. Direction ratios are proportional values that represent the direction of a line in space, and they can be any real numbers, including negative values. The sign of the direction ratios indicates the orientation of the line, but the actual direction is determined by the ratios' relative magnitudes rather than their individual signs. Thus, a line can have direction ratios like (-1, 2, 3) while still pointing in a valid direction.
Bearings in trigonometry?
The direction a ship (or really any moving object) takes is its bearing. That is maskes angles as its directions change. Using these angles and distances traveled, a ship can find how far it has moved from its original position, as well as find its current location on a map.
What are the direction cosines of the lines equally inclined to the axes?
They are ±1/sqrt(2) or, equivalently, ±sqrt(2)/2
How are sines and cosines used in meteorology?
In trigonometry sines and cosines are used to solve a mathematical problem. And sines and cosines are also used in meteorology in estimating the height of the clouds.
Are direct cosines of a vector unique?
No, the direct cosines of a vector are unique only up to a sign change. This means that if a set of direct cosines uniquely defines a vector, a set of direct cosines with opposite signs for all components would define the same vector.
When do you use the Law of Cosines?
We use the law of Cosines to be able to find : 1. The measure of the third side, when the measure of two sides and the included angle of a triangle ABC are known. 2. The measure of any angle, when the measure of the three sides of a triangle ABC are known.
Can the law of cosines be used to find a length or just angle?
Either.However, if you know two sides and the includedangle then the sine rule is simpler.
Who discovered the law of cosines?
A caveman from 10,000 BCal-Kashi was the 1st to provide an explicit statement of the law of cosines in a form suitable for triangulation
What is table of cosines?
It is a table that gives the cosines of angles, usually from 0 to 90 degrees in steps on 0.1 degree. These were used extensively for trigonometric calculations before the advent of computers.
How do you find the missing angles of a triangle with one?
you must know more information. Like the lengths of 2 sides. Then using Trig (law of sines or law of cosines) you can find the remaining sides and angles.
How do you calculate the angles of a triangle knowing the sides?
Law of cosines
How do you find a missing side of a triangle without a right angle?
Having sufficient angles or sides one can use either, The Law of Sines, or, The Law of Cosines. Google them.
What is sec151 degrees to the nearest thousandth and how can you find this on a scientific calculator?
sec(151 degrees) = -1.143In order to find it on a calculator, remember that the secant is 1/cosine.As long as your calculator does cosines, you're all set.
Law of cosines with a right angle?
The law of cosines with a right angle is just the pythagorean theorem. The cosine of 90 degrees is 0. That is why the hypotenuse squared is equal to the sum of both of the legs squared
