1. Be sure that your graphing calculator is in degree mode.
2. Press sin(
3. Press 72, )
4. Press Enter
The calculator shows: .9510565163
5. Round to .95
Answer: sin 72° = .95
Chat with our AI personalities
90 degrees - 72 degrees = 18 degrees -------------------
Sin(X) = 0.9 X = Sin^(-1) 0.9 X = 64.158... degrees.
72 degrees is an acute angle
sin(90) = 1
sin(360+30) =sin(30)= 1/2