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How to evaluate the half angle using the sine function

1,709 views · Published 26 April 2012 · 2:22 · Indexed 6 November 2026

Channel: Brian McLogan · 2012 · Education

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👉 Learn how to evaluate the Sine of an angle using the half-angle formula. The half-angle formula for Sine is helpful when you need to determine the exact value of function given an angle but cannot use a calculator or the angle is not on the unit circle.  To evaluate all we need to do is enter the angle into the formula and simplify.  Rationalizing the denominator is not required but often is asked to be performed.

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Organized Videos:
✅ Half Angle Formulas
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMrThfrxrltuSDxZxP5APdbM
✅ Evaluate Half Angle Formulas of and Angle
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMrV5qtYaqx4qC7Hoe2nr8K3
✅ Evaluate Half Angle Formulas from a triangle
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMp7ptYJNQcDrtyRiWDnIpQY
✅ Write the Expression as a single function | Half Angle Formulas
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMovEYAsvjLCo8lYBrBJcc7T
✅ Solve Equations using Half Angle Formulas
https://www.youtube.com/playlist?list=PL0G-Nd0V5ZMpwkFkUFvDSo7L2KPqsW18f

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