pre calc

find delta in each of the following case:

tan delta=-0.75

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  1. The domain of tan(x) is from -π/2 to π/2. So the reference angle for tan(δ)=-0.75 is between -&pi/2; to 0.
    Having found the reference angle δ (approx. -0.64 radians), the general solution will be
    δ+kπ where k=an integer.

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  2. so what will be the solution

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  3. A pre-calculus answer is -0.64 + kπ radians, where k∈ℤ.

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  4. The reason for the kπ is because tangent is a periodic function, with period equal to π radians.

    Also, for your solution, you will need to evaluate more accurately (accuracy according to instructions, 3-4 decimals normally) the value of arctan(-0.75).

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