anonymous
  • anonymous
simplify: cos(2x-y)cosy-sin(2x-y)siny
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
cos 2x
anonymous
  • anonymous
how??
anonymous
  • anonymous
cos (A+B)= cosAcosB - sinAsinB

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anonymous
  • anonymous
if u plug in A = 2x -y and B=y u get the same form
anonymous
  • anonymous
woah thanks!
anonymous
  • anonymous
noprob
anonymous
  • anonymous
find all solutions in the interval [0,2pie) 3sin(2t-pie)=3
anonymous
  • anonymous
sin (2t-pi) = 1 2t - pi = pi/2, 5pi/2.... 2t = 3pi/2, 7pi/2 t=3pi/4,7pi/4..and so on..there might be one more solution..check for more
anonymous
  • anonymous
post new questions in the questions panel from now on

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