1. Measure side a and side c, and compute a/c. Use a protractor to measure angle A,^{ }_{ }
and find sin A with a calculator. Does a/c = sin A?^{ }_{ }
2. Measure side b, and compute b/c. Find cos A with a calculator. Are they
the same?^{ }_{ }
3. Do the same for angle B: measure b, and compute b/c. Measure angle B, and
find sin B with a calculator. Are they the same?^{ }_{ }
4. You can also compute the tangents of the two angles, by forming ratios
of sides, and by using a calculator.^{ }_{ }
5. How could you find the measure of angle A, if you did not have a protractor?
^{ }_{ }