obliczanie sinusów kosinusów tangensów zadanie w załączniku pilne ! 

a)a=2 c=8 cosα=a/c cosα=2/8=1/4 (1/4)²+sin²α=1 1/16+sin²α=1 sin²α=1-1/16 sin²α=15/16 sinα=√15/4 tgα=sinα/cosα=√15/4 :1/4=√15/4·4/1=√15 ctgα=cosα/sinα=1/4:√15/4=1/4·4/√15=1/√15=√15/15 sinβ=a/c=2/8=1/4 cosβ=√15/4 tgβ=√15/15 ctgβ=√15 b)a=4 b=7 tgδ=a/b=4/7 ctgδ=7/4=1¾ c=√[4²+7²]=√[16+49] c=√65 sinδ=a/c=4/√65=4√65/65 cosδ=b/c=7/√65=7√65/65 tgγ=7/4 ctgγ=4/7 sinγ=7/√65=7√65/65 cosγ=4√65/65 c)a=1 c=√3 cosy=a/c=1/√3=√3/3 sin²y+(√3/3)²=1 sin²y+3/9=1 sin²y=1-1/3 sin²y=2/3 siny=√2/√3=√6/3 tgy=siny/cosy=√6/3 :√3/3=√6/3·3/√3=√6/√3=√2 ctgy=cosy/siny=√3/3 :√6/3=√3/3·3/√6=√3/√6=1/√2=√2/2 sinx=1/√3=√3/3 cosx=√6/3 tgx=√2/2 ctgx=√2