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What situation would you be FORCED to use law of cosines as opposed to law of sines?
Wiki User
∙ 13y ago
When none of the angles are known, and using Pythagoras, the triangle is known not to be right angled.
Wiki User
∙ 13y ago
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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.
Can trig functions work on non-right triangles?
Yes. Look up the law of sines and the law of cosines as examples. there are also formulas that can find out the area of a non-right triangle.
Word problem of oblique triangle using law of sines?
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If you have all sides of a triangle how do you use the law of cosines to solve the angles?
Label the angles of the triangle A, B, and C. Label the side opposite angle A side a, the one opposite angle B side b, and the one opposite angle C side c. Let's say you want to solve for angle A, you use the law of cosines: a^2=b^2+c^2-2bcCosA CosA is the "variable" in this equation, so isolate this. When you have that, you'll have some number (let's call it D) equal to CosA: D=CosA Use the inverse Cos function to find the measure of the angle: Cos^-1(D)=A And you have the measure of angle A. From here you can either use the law of cosines again to find a second angle and then the third, though the easier route is usually to just use the law of sines for find the second angle and then the fact that all three angles add to 180 to find the third.
Which equation correctly represents the law of sines?
SinA/a = SinB/b = SinC/c
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.
What branch of mathematics is concerned with sines and cosines?
Trigonometry mainly but also geometry, algebra.
How do you simplify csc theta -cot theta cos theta?
For a start, try converting everything to sines and cosines.
Relevance in trigonometry in act?
The ACT asks questions about basic sines, cosines, and tangents. These questions can be answered without a calculator.
When would you use the law of sines or law of cosines instead of a trigonometric ratio?
Trigonometric ratios, by themselves, can only be used for right angled triangles. The law of cosines or the sine law can be used for any triangle.
Altitude of right triangle with only one side known?
Law of sines or cosines SinA/a=SinB/b=SinC/c
When do you use law of sines and law of cos sines?
Use Law of Sines if you know:Two angle measures and any side length orTwo side lengths and a non-included angle measure.Use Law of Cosines if you know:Two side lengths and the included angle measure orThree side lengths.
What is the fourier series?
It's an infinite sum of sines and cosines that can be used to represent any analytic (well-behaved, like without kinks in it) function.
Why the basic building block of signal is sine wave?
Every periodic signal can be decomposed to a sum (finite or infinite) of sines and cosines according to fourier analysis.
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.
How do you find the unknown angle of a triangle?
If you have two other angles, then add up those 2 and subtract that from 180. if you have all 3 sides then use the law of cosines: a squared = b squared + c squared - 2bc (cos A) If you have one angle and the 2 included sides, use the law of cosines as well. if you have an angle and the length of its opposite side, and the side opposite to the angle you want, then use the law of sines: sin A/ a = sin B/ b if you have the angle and the length of its opposite side and another angle, use the law of sines to figure out the unwanted angle anyway and then follow situation 1.
Can trig functions work on non-right triangles?
Yes. Look up the law of sines and the law of cosines as examples. there are also formulas that can find out the area of a non-right triangle.
