what's sin when tan = -2?
\(\large sinx=\pm\frac{tanx}{\sqrt{1+tan^2x}}\)
\(sinx=\pm\frac{-2}{\sqrt{1+(-2)^2}}\)
\(sinx=\frac{\pm2}{\sqrt5}=\pm0.894427191\)
\(When \ tanx =-2 \ \ then \ \ sinx=\pm0.894427191.\)
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