Question

qual o valor de seno 30° +cos 60° + tan135°? ​

Answer 1

Resposta:

$=30^{\circ \:}+\cos \left(60^{\circ \:}\right)+\tan \left(135^{\circ \:}\right)\\\\=30^{\circ \:}+\frac{1}{2}-1\\\\=-\frac{1}{2}+30^{\circ \:}$