hasibaram1 hasibaram1
  • 23-11-2018
  • Mathematics
contestada

half angle formula for cosB

half angle formula for cosB class=

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jimrgrant1 jimrgrant1
  • 23-11-2018

the half angle identity for cosine is

cos ([tex]\frac{B}{2}[/tex]) = ± [tex]\sqrt{(1+cosB)/2}[/tex]


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