kaylala
  • kaylala
TOPIC: (trigonometry) Addition and Subtraction Identity FOrmulas Find the value of: sin(-105)
Mathematics
chestercat
  • chestercat
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kaylala
  • kaylala
kaylala
  • kaylala
kaylala
  • kaylala

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agent0smith
  • agent0smith
105 = 60 + 45 and sin(-x) = -sinx so sin(-105) = -sin(60+45)
kaylala
  • kaylala
is the answer = (2(sqrt6))/4 ? @agent0smith
agent0smith
  • agent0smith
I don't know, wolfram alpha could check for you. Just use the angle sum formula
kaylala
  • kaylala
i did it but i'm not sure with the signs

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