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Aviral Anurag Tripathi Grade: 12
`        In a question, an inclined surface is inclined at arcsin 1/3 to the horizontal surface. What does this arcsin 1/3 means? `
8 years ago

## Answers : (4)

AskIITians Expert PRASAD IIT Kharagpur
18 Points
```
arcsin = angle
Let, @ = arcsin(1/3)
@ = angle between hypotenuse and the horizontal surface.
Then sin @ = 1/3
As sin @ = opposite side / hypotenuse
we have hypotenuse is thrice the length of the side opposite angle @.
```
8 years ago
Ramesh V
70 Points
```
An abbreviation for inverse sine.
arsin(x) or arcsin(x) means the inverse sine of x, i.e. the number whose sine is x.
Occasionally asin(x) is used to mean the same thing.

here its sin-1(1/3)
```
8 years ago
AskIITians Expert Hari Shankar IITD
17 Points
```										arcsin is sin inverse.
theta = arcsin(1/3) means sin(theta) = 1/3
```
8 years ago
Sameer Satyam
8 Points
```										Just another way to write sine inverse.......

```
8 years ago
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