cutiecomittee123
  • cutiecomittee123
What did I do wrong? Calculate cos theta to two decimal places-
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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cutiecomittee123
  • cutiecomittee123
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cutiecomittee123
  • cutiecomittee123
Here is my work; 7^2=8^2+11^2-2(8)(11)cos(A) 49=185-176cos(A) -136=-179cos(A)=.77 Cos^-1(.77)=.69 .69(180/pi)=39.53
cutiecomittee123
  • cutiecomittee123
Im confused because the answers given are -0.14 -0.07 0.69 -0.42

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anonymous
  • anonymous
law of cosines problem?
anonymous
  • anonymous
i can see the issue right away it looks to me like you are working in degrees, but the answers are given in radians
cutiecomittee123
  • cutiecomittee123
Oh okay so I just needed to make sure to calculate that
cutiecomittee123
  • cutiecomittee123
but i tried doing it in radians and my answer was obviouse .69, that was incorrect.

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