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x²=9=16
x=5
α
sinα=⅗
cosα=⁴₅
tgα=¾
ctgα=⁴₃
β
sinβ=⅘
cosβ=⅗
tgβ=⁴₃
ctgβ=¾
B)
x²=9²+12²
x²=81+144
x=225
x=15
SINα=9/15
COSα=12/15
tgα=9/12
ctgα=12/9
sinβ=12/15
cosβ=9/15
tgβ=12/9
ctgβ=9/12