Question

Oblicz sinx z :
tgx/2=1/3

Z góry dziekuję:)

Answer 1

tg/2=1/3

tg/2=[sin/cos]/2

tg/2=[sin* 1/cos]/2

tg/2=sin/2 * 1/2cos

tg/2=sin/4cos

 

sin/4cos=1/3

sin=1/3 * 4cos

 

 

Answer 2

tgx/2=1/3

3tgx=2

3(sinx/cosx)=2

3sinx=2·cosx

sinx=(2cosx)/3

sinx=⅔cosx