Объяснение:
1.
sin∠B=AC/AB=20/29
cos∠B=BC/AB=21/29
tg∠B=AC/BC=20/21
ctg∠B=BC/AC=21/20
2.
sin∠B=AC/AB=21/29
cos∠B=BC/AB=20/29
tg∠B=AC/BC=21/20
ctg∠B=BC/AC=20/21
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Объяснение:
1.
sin∠B=AC/AB=20/29
cos∠B=BC/AB=21/29
tg∠B=AC/BC=20/21
ctg∠B=BC/AC=21/20
2.
sin∠B=AC/AB=21/29
cos∠B=BC/AB=20/29
tg∠B=AC/BC=21/20
ctg∠B=BC/AC=20/21