## Trigonometry (11th Edition) Clone

Step 1: First, we convert the angle into decimal degrees: $72^{\circ}30'=72\frac{30}{60}^{\circ}=72.5^{\circ}$ Therefore, $\sin 72^{\circ}30'=\sin 72.5^{\circ}$ Step 2: Then, we make sure that the calculator is in degree mode. Step 3: We then type $\sin 72.5^{\circ}$ into the calculator. Step 4: Solving, $\sin 72.5^{\circ}\approx0.95371695$.