A couple of trigonometry students are trying to answer the problems below, but, just when they need it most, their calcu

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A Couple Of Trigonometry Students Are Trying To Answer The Problems Below But Just When They Need It Most Their Calcu 1 (56.55 KiB) Viewed 32 times

A couple of trigonometry students are trying to answer the problems below, but, just when they need it most, their calculator dies! Use the symmetry of the unit circle (with hands off your calculator) to answer the questions below. (a) Suppose while their calculator was working they had found that the point P ≈ (0.656, 0.755) on the unit circle corresponded to the angle 49º. How could they now use that information to estimate sin 131° and cos 131° without a calculator? sin 131° cos 131° Number Number (b) Suppose while their calculator was working they had found that the point Q (0.934, 0.358) on the unit circle corresponded to the angle 21°. How could they now use that information to estimate sin 339° and cos 339° without a calculator? sin 339 Number cos 339° Number