Question Number 116641 by nguyenthanh last updated on 05/Oct/20
Answered by TANMAY PANACEA last updated on 05/Oct/20
$${A}={B}={C}=\mathrm{60}^{{o}} \\ $$$${sin}\mathrm{30}^{{o}} ×{sin}\mathrm{30}^{{o}} ×{sin}\mathrm{30}^{{o}} =\frac{\mathrm{1}}{\mathrm{8}} \\ $$$${cos}\mathrm{60}^{{o}} ×{cos}\mathrm{60}^{{o}} ×{cos}\mathrm{60}^{{o}} =\frac{\mathrm{1}}{\mathrm{8}} \\ $$