Arcsine
Definition of Arcsine

• Arcsine is the inverse function of sine. It is also written as arcsin or sin^{- 1}. If y = sin x, then x = arcsin y.

Example of Arcsine

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  or
  
  This means that the angle 30° has sine equal to .

   

Solved Example on Arcsine

arcsin(0.1218) = ?
Choices:
A. 12°
B. 83°
C. 78°
D. 7°
Correct Answer: D
Solution:
Step 1:   arcsin(0.1218) = 7°, rounded to the nearest degree.      [Use calculator in degree mode.]

Related Terms for Arcsine

• Sine
• Inverse Function

Additional Links for Arcsine

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• Sine
• Inverse function
• Function
• Arc