## Trigonometry (11th Edition) Clone

The weight first reaches its maximum height at $t = 0.125~seconds$
$s(t) = -4~cos~8\pi~t$ The weight reaches its maximum height when $cos~8\pi~t = -1$. We can find $t$ when the weight first reaches its maximum height: $cos~8\pi~t = -1$ $8\pi~t = \pi$ $t = \frac{1}{8} = 0.125~s$ The weight first reaches its maximum height at $t = 0.125~seconds$