Inequality

For Schwarz inequality for 2 signals $s_1(t)$ and $s_2(t)$, equality holds if $s_1(t) = c\cdot s_2(t)$ ($c$ is constant). Does $c$ have to be real?
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Inequality Calculator
How do I solve an inequality problem?How do you solve an inequality 4x 7 5? How do I solve an inequality problem?When solving an inequality: • you c...