Ex: Solve a Trigonometric Equation Using a Calculator (sin(x)=-0.36)

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This video explains how to find the solutions to a trig equation on the interval [0,2pi) using a calculator.
  1. Mathispower4u
  2. trig
  3. trigonometric
  4. equations
  5. solve
  6. interval
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Комментарии
Автор

how do you know whether to add or subtract though.

cyanntaylor
Автор

i tried this with a sample problem, and when i got to the step where you either add 2pi or subtract from 2pi, i did both and got different answers each time. why does this happen, and how do you know which one is correct?

theLadyofSpoons
Автор

in the 4th quadrant its supposed to be 2pi-theta. I noticed that you kept theta's original negative sign and then changed it for quadrant 3. Why was this? Also quadrant 3 its supposed to be theta - pi, however, you said it was pi+ positive theta. What are the rules for going clockwise?

marin