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tg 35*tg65+sin15*cos75+cos15*sin75=tg35*ctg35+sin15*sin15+cos15*cos15=1+1=2 odp.C
22
tg α=√3/2
odp.C, bo tg 45=1, a √3/2<1, ale √3/2> √3/3=tg30
23
(sinα + cos β)/(3 * tg α +1) * tg β=
tg α=3√2/√6
tg α=3√12/6
tg α=2√3/2
tg α=√3
tgβ=√6/3√2
tgβ=1/√3
tgβ=√3 /3
(3√2)²+√6²=c²
c²=18+6
c²=24
c=√24
c=2√6
sinα=cosβ=3√2/2√6
sinα=cosβ=3√12/12
sinα=cosβ=2√3/4
sinα=cosβ=√3/2
(sinα + cos β)/(3 * tg α +1) * tg β=(√3/2+√3/2)/(3*√3+1) *√3 /3=
(√3)/(3√3+1) *√3 /3=1/(3√3+1)=(3√3-1)/(3√3+1)(3√3-1)=
(3√3-1)/(27-1)=(3√3-1)/26
24
tg α=2
sinα
cos α
ctgα =1/2
sin²α+cos ²α=1
sin α/cosα=2
sin α=2cosα
(2cosα)²+cos ²α=1
4cos²α+cos ²α=1
5cos²α=1 /:5
cos²α=1/5
cosα=√1/5
cosα=√5 /5
sinα=2√5 /5