anonymous
  • anonymous
Which of the following choices is a simplification of sin 60°cos15°-sin15°-cos60°?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
anonymous
  • anonymous
can someone please help me with this
DanJS
  • DanJS
use the values here... http://www.embeddedmath.com/downloads/files/unitcircle/unitcircle-letter.pdf

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More answers

DanJS
  • DanJS
the x - coordinates are the cosine of the angle, the y- coordinates are the sine of the angle
DanJS
  • DanJS
Each point on the circle radius 1 is ( cos(theta) , sin(theta) )
anonymous
  • anonymous
so in this case, i feel like c (the third answer) is the right one? Is it correct?
DanJS
  • DanJS
didnt calculate.. umm
jim_thompson5910
  • jim_thompson5910
hint: sin(A - B) = sin(A)cos(B) - cos(A)sin(B)
anonymous
  • anonymous
yea i'm having trouble to convert, it seems like the 3rd answer to me
DanJS
  • DanJS
ah i just about to say the sum formula
DanJS
  • DanJS
Is that a minus though after sin(15)
jim_thompson5910
  • jim_thompson5910
I think the original problem should be sin 60°cos15°-sin15°cos60°
DanJS
  • DanJS
yea
anonymous
  • anonymous
could it be #A?
DanJS
  • DanJS
Apply that sum formula first, here is a cheat sheet to remember properties and identities
anonymous
  • anonymous
JIm was correct, the original question is like what he said, it was a typo
DanJS
  • DanJS
yea, so apply this rule... sin(A - B) = sin(A)cos(B) - cos(A)sin(B)
DanJS
  • DanJS
since the question is exactly th eform of that right side
DanJS
  • DanJS
sin(60 - 15) = sin(45)
DanJS
  • DanJS
root 2 over 2
anonymous
  • anonymous
I will go through your sugguested process again to confirm, thank you so much!
DanJS
  • DanJS
yeah, just have to recognize that form to simplify it with the identity thing, Either way, you could have just subbed all 4 values in and it would come out the same
anonymous
  • anonymous
sorry idk i wish i could help doe
anonymous
  • anonymous
love u
anonymous
  • anonymous
wrong person
anonymous
  • anonymous
new phone who dis
anonymous
  • anonymous
u should go on pathway
anonymous
  • anonymous
it rally helps
anonymous
  • anonymous
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