Sagot :
Bonjour,
1) Pythagore : RS² = SU²+RU²
donc RU²=RS²-SU²=3²-2²=5
donc RU=√5
2) Cos angle SRU = RU/SR = √5/3
Sin angle SRU = SU/SR = 2/3
Cos angle RSU = SU/SR = 2/3
Sin angle RSU = UR/SR = √5/3
Tan angle RSU = UR/US = √5/2
Bonjour,
1) Pythagore : RS² = SU²+RU²
donc RU²=RS²-SU²=3²-2²=5
donc RU=√5
2) Cos angle SRU = RU/SR = √5/3
Sin angle SRU = SU/SR = 2/3
Cos angle RSU = SU/SR = 2/3
Sin angle RSU = UR/SR = √5/3
Tan angle RSU = UR/US = √5/2