АС²=АВ²-ВС²=13²-12²=169+144=25.
АС=√25=5.
sinA=12/13. cosA=5/13. tgA=12/5=2.4.
sinB=5/13. cosB=12/13. tgB=5/12.
АС²=АВ²-ВС²=13²-12²=169+144=25.
АС=√25=5.
sinA=12/13. cosA=5/13. tgA=12/5=2.4.
sinB=5/13. cosB=12/13. tgB=5/12.