What is the difference between arcsin and inverse sin?

In summary, arcsin and inverse sin, arccos and inverse cos, and arctan and inverse tan are all different names for the same functions. However, there is a trick with sine and cosine as they have limited domains and ranges. The 'arcsine' and 'arccosine' are the inverse functions of 'sine' and 'cosine' respectively. The same applies for other circular trigonometric functions such as tan, cotan, sec, and cosec.
  • #1
tony873004
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What's the difference between arcsin and inverse sin?
arccos and inverse cos?
arctan and inverse tan?
 
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  • #2
nothing they are the same...different ways of saying the same thing.
 
  • #3
tony873004 said:
What's the difference between arcsin and inverse sin?
arccos and inverse cos?
arctan and inverse tan?

None,none,none...There is a trick though.For sine and cosine for example,defined on R,the rule f:A->B,f-1:B->A would not apply,since
[tex] \sin x:R\rightarrow [-1,+1] [/tex]
[tex] \cos x:R\rightarrow [-1,-1] [/tex]
[tex] \arcsin x:[-1,+1]\rightarrow [-\frac{\pi}{2},+\frac{\pi}{2}] [/tex]
[tex] \arccos x:[-1,+1]\rightarrow [0,\pi] [/tex]
,so the 'arcsine' and 'arccosine' are the inverse functions of 'sine' respectively 'cosine',BUT SINE X is inveritble only on the interval [itex] [-\frac{\pi}{2},+\frac{\pi}{2}] [/itex],and similar for COSINE X.
I'll let u work out the other examples for circular trigonometric functions:tan,cotan,sec,cosec.

Daniel.
 

1. What is the difference between arcsin and inverse sin?

The difference between arcsin and inverse sin lies in the notation used to represent the inverse trigonometric function. Inverse sin is typically written as "sin-1" while arcsin is written as "arcsin". Both notations refer to the same function, which is the inverse of the sine function.

2. Are arcsin and inverse sin interchangeable?

Yes, arcsin and inverse sin can be used interchangeably as they represent the same function. However, it is important to note the difference in notation when communicating or solving equations involving inverse trigonometric functions.

3. What is the domain and range of arcsin and inverse sin?

The domain of arcsin and inverse sin is [-1, 1], which corresponds to the range of the sine function. The range of arcsin is [-π/2, π/2], while the range of inverse sin is [-90°, 90°]. These ranges represent the possible angles whose sine is equal to a given value.

4. How do you solve equations involving arcsin and inverse sin?

To solve equations involving arcsin and inverse sin, use the inverse trigonometric identity "sin(arcsin(x)) = x". This means that the arcsin of a value will give you the angle whose sine is equal to that value. For example, if sin(x) = 1/2, then arcsin(1/2) = x.

5. Can arcsin and inverse sin be used for non-right triangles?

No, arcsin and inverse sin are only applicable to right triangles. For non-right triangles, you would use the inverse trigonometric functions of cosine and tangent, which are arccos and arctan respectively.

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