### Home > CCA2 > Chapter 7 > Lesson 7.1.2 > Problem7-16

7-16.

Find the measure of angle A in the diagram below.

The length $0.3$ is opposite angle $A$ and the length $1$ is the hypotenuse. Which trigonometric relationship works with opposite and hypotenuse?

$\sin A = \frac{0.3}{1}$

$A=\sin^{-1}(0.3)\approx17.46°$