pottersheep
  • pottersheep
Trig question...cos ( 90 + Q) is it equal to + sin Q since it's in quadrant 2 ? Or is it -sin Q since cos is negative in quadrant 2 ?...:s
Mathematics
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pottersheep
  • pottersheep
Trig question...cos ( 90 + Q) is it equal to + sin Q since it's in quadrant 2 ? Or is it -sin Q since cos is negative in quadrant 2 ?...:s
Mathematics
katieb
  • katieb
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amistre64
  • amistre64
well, it is negative if Q is between 0 and 90
amistre64
  • amistre64
err, 0 and 180 .... doesnt really leave the left side does it till 270
amistre64
  • amistre64
but yeah, think of it like tuning the graph so that y is in place of the x axis

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amistre64
  • amistre64
cos(t-90) = sin(t)
pottersheep
  • pottersheep
It's cos ( 90 + Q) not 90 - Q tho :P
pottersheep
  • pottersheep
or t - 90 as you said

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