Recall that the point of this exercise is to confirm the values given by a calculator for the sine, cosine and tangent of x at every 5 degree increment from 5 to 90 degrees. At this point in my investigation, I can return to the trigonometric formulas I was using before needing to use the sine power series.

For :

At :

At :

At :

At :

Having reached this point in my computations, I am nearing the end of my investigation. I will need two more formulas to reach the finish line:

Now, for :

Next, we compute the values for :

Moving on, :

For :

For :

Now, the last set of computations, for :

THE TEST:

Having finished my computations, I turn to my calculator to see how my answers correspond to those given by the calculator. The only computations that are not completely identical (to nine decimal places) are a few of the tangents. Return to the previous page for a complete table of computed values.

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