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wach

Some simple inverse trig functions. Can you check my answers? 1. sin(tan^-1 -4/30 = -3/5 2. sin^-1(sin(5pi/4) = -pi/4

  • one year ago
  • one year ago

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  1. EulerGroupie
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    Assuming that 0 is a parenthesis in 1) |dw:1349413412829:dw|the sine is opp/hyp which is -4/5

    • one year ago
  2. EulerGroupie
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    2) looks good though

    • one year ago
  3. wach
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    Oh, right. Because tan inverse exists only in the 4th and 1st quadrant, thus it's -4 instead of -3. Ok. Cool, makes sense. Thanks! :)

    • one year ago
  4. EulerGroupie
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    You're welcome.

    • one year ago
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spraguer (Moderator)
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