Answer:
a) 24 degrees
b) 50 degrees
Explanation:
part a : use sine-1
sine-1 =
![(opposite)/(hypotenuse)](https://img.qammunity.org/2022/formulas/mathematics/high-school/h6fx1cewb259sgudymeyaaxx9x6xz4bx3m.png)
sine-1 =
![(17)/(42)](https://img.qammunity.org/2022/formulas/mathematics/high-school/swtfm149lxxx84h76iwmfzl10yvr8k5oj4.png)
sine-1 = 0.405
missing angle = 23.89
round to the nearest degree = 23.89 = 24
part b : use cosine-1
cos-1 =
![(adjacent)/(hypotenuse)](https://img.qammunity.org/2022/formulas/mathematics/high-school/ler4i8h44p63uj8683grselxl9pdbwfuio.png)
cos-1 =
![(16)/(25)](https://img.qammunity.org/2022/formulas/mathematics/high-school/pmd9d02xb8v46ka8fv2subya3n6l3l0w6b.png)
cos-1 = 0.64
missing angle = 50.208
round to the nearest degree = 50.208 = 50