Question

Zadania z trygonometrii w załączniku. Błagam..

Answer 1

1 a)

b)sin -

cos +

tg-

ctg-

sin=-0,4

1-sin^2x=cos^2x<=>cos=

tg=\

ctg=1/tg

d) |ctg|=<=>ctg= v vtg=-

ctgx =<=>x=<=>x= i x=

ctgx=-<=>x=-<=>x= i x=

2cos(2x+pi/2)=

cos(2x+pi/2)=<=>2x+pi\2=<=>

2x+pi/2=pi/6+2kpi v 2x+pi/2=-pi/6+2kpi

x=-2pi/6+kpi v x=-4pi/6 +kpi odp. x=2/3pi i 1/3pi i10/6pi i 8/6pi

5.po przeliczeniu cos600=-cos60=-1/2

sin 405=sin45

sin540=cos90=0

cos480=-sin30=-1/2