2) \( y=f(x)=12 \cos (3 x+\pi / 4) \) 3) \( y=-7 \operatorname{sen}(4 x-\pi / 3) \)
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Beyond the Answer
Did you know that the cosine and sine functions have been used for centuries in various cultures to model periodic phenomena such as tides, seasons, and even the motion of celestial bodies? Ancient Greeks, particularly Ptolemy, utilized trigonometric functions in their astronomical calculations, laying the groundwork for how we understand periodic behavior in nature! In real-world applications, functions like \( f(x) = 12 \cos(3x + \frac{\pi}{4}) \) and \( g(x) = -7 \sin(4x - \frac{\pi}{3}) \) can be used to model everything from sound waves to the motion of pendulums. Engineers analyze such functions to design structures that can withstand regular vibrations, ensuring everything from bridges to buildings stays safely anchored against the forces of nature!
