What are the half angle trig formulas?

sin(theta/2)=+-sqrt((1-costheta)/2))

cos(theta/2)=+-sqrt((1+costheta)/2))

tan(theta/2)=+-sqrt((1-costheta)/1+costheta))

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  • Last Updated Mar 05, 2026
  • Views 4
  • Answered By Jacob Morton

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