Solving Trigonometric Ratios: Finding cosx/cosy from sinx/siny

In summary, the conversation revolves around finding the value of cosx/cosy with the given information of sinx/siny=1.2. The speaker is unsure if they have enough knowledge to solve the problem and is seeking more information. The other person suggests that more context is needed in order to determine a specific trigonometric relationship between the two angles. Without further information, it is difficult to narrow down the possible values and solve the problem.
  • #1
alexay95
17
0
i got sinx/siny=1.2

and i need to find cosx/cosy

can i do it or maybe i need more knowledge?
 
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  • #2
More information would help.
Context perhaps?
 
  • #3
its a problem at optics and i need to solve this problem.
that all i know from the problem given.
 
  • #4
It looks like you are trying to get an answer using an inefficient method.
What is the problem you are doing?
 
  • #5
For example, if sin(x) and sin(y) are both positive, cos(x) and cos(y) could be positive or negative. So for one value of sin(x)/sin(y) there are two different possible values for cos(x)/cos(y).
 
  • #6
Why would it matter, u can say that sinx worth 0.5 and that's mean that cosx is positive and negative too.i just need a trigonometric connection between the two
 
  • #7
The general trig relationship between them is sin2θ + cos2θ = 1 because sinx and cosx are the opposite and adjacent sides of a right-angle triangle with unit hypotenuse.

if sinx=1/√2, then cosx=1/√2
But your problem is that you don't know what sinx is, what you know is the ratio of the sines of two angles ... sinx/siny.

In general: if sinx/siny=S, for a known S, then sinx and siny can take on any values that satisfy sinx=S.siny ... infinite possibilities. You need to know something about the relationship between x and y to narrow them down.

That is why I have asked for more information about the actual problem you are trying to solve.
Without that information, nobody can help you.
I do not understand your reluctance to share.
 

FAQ: Solving Trigonometric Ratios: Finding cosx/cosy from sinx/siny

What is a trigonometric problem?

A trigonometric problem is a mathematical problem that involves the use of trigonometric functions such as sine, cosine, and tangent to solve for unknown values in a triangle. These functions are used to relate the angles and sides of a triangle, and are commonly used in fields such as engineering, physics, and navigation.

Why are trigonometric problems challenging?

Trigonometric problems can be challenging because they require a solid understanding of trigonometric concepts and the ability to apply them in various scenarios. They often involve complex calculations and require multiple steps to solve. Additionally, trigonometric problems may involve both real and imaginary numbers, making them even more challenging.

What are some common types of trigonometric problems?

Some common types of trigonometric problems include solving for missing angles or sides in a right triangle, finding the height or distance of an object using trigonometric ratios, and solving for the period or amplitude of trigonometric functions. Trigonometric problems can also involve real-life applications such as finding the angle of elevation or depression in navigation or surveying.

How can I approach solving a trigonometric problem?

When solving a trigonometric problem, it is important to first identify what is being asked and what information is given. Then, determine which trigonometric function is most appropriate to use based on the given information. Next, use the appropriate formula and solve for the unknown value. Finally, make sure to check your answer and use proper units if necessary.

What are some tips for solving trigonometric problems?

Some tips for solving trigonometric problems include practicing regularly, understanding the relationships between trigonometric functions, using the unit circle to visualize and solve problems, and checking your work for accuracy. It is also helpful to break down the problem into smaller, more manageable steps and to use diagrams or sketches to aid in understanding the problem.

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