uzasadnij ze dla dowolnego alfa 0st 180st

L= [latex] sin alpha - frac{sin alpha }{cos alpha } *cos alpha =[/latex] =[latex]sin alpha -sin alpha =[/latex]0=P L=P cnd L= [latex]tg^{2} alpha *cos^{2} alpha + cos^{2} alpha = frac{sin ^{2 alpha } }{ cos^{2} alpha } * cos^{2} alpha + cos^{2} alpha = sin^{2} alpha + cos^{2} alpha =1=P[/latex] L=P cnd