ladponder
ladponder ladponder
  • 09-11-2017
  • Mathematics
contestada

sin(-150°) = -sin30° True or false

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tynollette tynollette
  • 09-11-2017
true.
30 is in the first quadrant. sin30 is a positive number, -sin30 is a negative number.
-150 is in the third quadrant, sin-150 is negative
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