Question

28(sin^2 23-cos^2 23)/cos 46

Answer 1

$\frac{28( sin^{2}(23)- cos^{2}(23)) }{cos(46)}$=

$\frac{-28*( cos^{2}(23)- sin^{2}(23)) }{cos(46)}$=

$\frac{-28*cos(46)}{cos(46)}$= - 28
Ответ: - 28