MHB Solve Equation w/ Arcsin: How to Get 1/sqrt2 from pi/4

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SUMMARY

The discussion centers on solving the equation involving arcsin and understanding how to derive 1/sqrt(2) from pi/4. The user references Wolfram Alpha for a step-by-step solution and highlights confusion regarding the step of taking the sine of both sides. It is established that sin(pi/4) equals 1/sqrt(2), a fundamental trigonometric identity derived from the properties of an isosceles right triangle.

PREREQUISITES
  • Understanding of trigonometric functions, specifically arcsin and sine.
  • Familiarity with the unit circle and its significance in trigonometry.
  • Basic knowledge of isosceles right triangles and their angle properties.
  • Experience with mathematical software tools like Wolfram Alpha for solving equations.
NEXT STEPS
  • Study the derivation of trigonometric identities, focusing on sin(pi/4).
  • Explore the properties of the unit circle and how they relate to arcsin and sine functions.
  • Learn about the applications of Wolfram Alpha in solving complex mathematical equations.
  • Investigate the geometric interpretation of trigonometric values using isosceles right triangles.
USEFUL FOR

Students, educators, and anyone interested in mastering trigonometric functions and their applications in solving equations involving arcsin and sine.

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Hello, I was trying to solve an equation with arcsin and I wasn´t sure about the result so I tried wolfram alpha with step by step solution and there is one step that I don´t understand, the one where you take the sine of both sides. How can I get 1/sqrt2 from pi/4 ? Thanks for help.View attachment 4961
 

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Mathematics news on Phys.org
sin(pi/4) = 1/sqrt(2) is probably the most well-known trigonometric value (it comes from the isosceles right angle triangle).
 

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