Question Number 149137 by mathdanisur last updated on 03/Aug/21 | ||
$${if}\:\:\:{ctg}\boldsymbol{\alpha}\:=\:−\mathrm{2}\:\:\:{and}\:\:\:\frac{\mathrm{3}\pi}{\mathrm{2}}\:<\:\alpha\:<\:\mathrm{2}\pi \\ $$ $${find}\:\:\:{sin}\boldsymbol{\alpha}\:=\:? \\ $$ | ||
Commented byliberty last updated on 03/Aug/21 | ||
$$\mathrm{sin}\:\alpha=−\frac{\mathrm{1}}{\:\sqrt{\mathrm{5}}} \\ $$ | ||