Question

57/sin(-27pi/4)cos(25pi/4)

Answer 1

sin(-27pi/4)=sin(-3pi/4)=-sin(3pi/4)=-$sqrt{2}/2$
cos(25pi/4)=cos(pi/4)=$sqrt{2}/2$
57÷(-$sqrt{2}/2$*$sqrt{2}/2$)=-104

Answer 2

Упс... не -104, а -114

Answer 3

спасибо

Answer 4

(4 cos 34градусов)/(sin56градусов) не поможете и с этим?