Chapter 4: Problem 53
Find (if possible) the complement and supplement of each angle. (a) \(18^{\circ}\) (b) \(85^{\circ}\)
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Chapter 4: Problem 53
Find (if possible) the complement and supplement of each angle. (a) \(18^{\circ}\) (b) \(85^{\circ}\)
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Use a graph to solve the equation on the interval \([-2 \pi, 2 \pi]\). $$ \tan x=\sqrt{3} $$
Graph the functions \(f\) and \(g\). Use the graphs to make a conjecture about the relationship between the functions. $$ f(x)=\sin x-\cos \left(x+\frac{\pi}{2}\right), \quad g(x)=2 \sin x $$
Evaluate the expression without using a calculator. $$ \arccos \frac{1}{2} $$
The normal monthly high temperatures \(H\) (in degrees Fahrenheit) in Erie, Pennsylvania are approximated by \(H(t)=56.94-20.86 \cos (\pi t / 6)-11.58 \sin (\pi t / 6)\) and the normal monthly low temperatures \(L\) are approximated by \(L(t)=41.80-17.13 \cos (\pi t / 6)-13.39 \sin (\pi t / 6)\) where \(t\) is the time (in months), with \(t=1\) corresponding to January (see figure). (a) What is the period of each function? (b) During what part of the year is the difference between the normal high and normal low temperatures greatest? When is it smallest? (c) The sun is northernmost in the sky around June 21 , but the graph shows the warmest temperatures at a later date. Approximate the lag time of the temperatures relative to the position of the sun.
Sketch the graph of the function. Include two full periods. $$ y=2 \cot \left(x+\frac{\pi}{2}\right) $$
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