Question
Use a calculator to evaluate each function. Round your answers to four decimal places. (Be sure the calculator is in the correct angle mode.) $$\text { (a) } \cos 8^{\circ} 50^{\prime} 25^{\circ}$$ $$\text { (b) } \tan \frac{\pi}{8}$$
Step 1
We know that 1 minute is 1/60 of a degree and 1 second is 1/3600 of a degree. So, we have: $$8^{\circ} 50^{\prime} 25^{\prime\prime} = 8^{\circ} + \frac{50}{60}^{\circ} + \frac{25}{3600}^{\circ} = 8.8403^{\circ}$$ Show more…
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