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10-9.

Solve the trigonometric equations for the variable in the given interval.

  1.  

    Solve this equation using the same steps as you would to solve the equation
    .

    How do you 'undo' the sine function?

    You will need to use the key on your calculator. Remember that your calculator will only give one answer.

    Draw a unit cirlce to find the 2nd answer. Recall that .

  1.  

    Solve this equation using the same steps as you wold to solve the equation
    .

    Don't forget the ± sign.

    You do not need your calculator and should find 4 solutions.