anonymous
  • anonymous
Find the exact value of each expression without a calc.? cos(-π/6)sin(-π/4)-tanπ/4
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
cos(-π/6)=-sqrt3/2 sin(-π/4)=-sqrt2/2
anonymous
  • anonymous
-1
anonymous
  • anonymous
cos (-x)=cos(x) cos(pi/6)=sqrt3/2 sin(pi/4)=sqrt2/2 tan(pi/4)=1 now solve

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anonymous
  • anonymous
So i get the sol for the 3 equations separately and that's just my answer? Why are the eq stuck together then?
anonymous
  • anonymous
multiply them
anonymous
  • anonymous
hold on
anonymous
  • anonymous
sqrt 6/2?
anonymous
  • anonymous
so the answer is sqrt3/2 * (-sqrt2/2) -1
anonymous
  • anonymous
sqrt6 - 2/2?
anonymous
  • anonymous
that should be your answer!
anonymous
  • anonymous
Awesome, great thanks :)
anonymous
  • anonymous
yeah
anonymous
  • anonymous
good

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