Question

tan 0 cot 0 = 1

Answer 1

well you know that
\[t=\frac{s}{c}~~~~and~~~~\cot(x)=\frac{1}{t}=\frac{c}{s}\]Then,
\[\tan(0)\cot(0)=1 \\ \\ \frac{\cancel s}{\cancel c} \cdot\frac{\cancel c}{\cancel s} =1\]