# Homework Help: Finding the solution

1. Mar 9, 2007

### princiebebe57

This problem seems really easy but I don't know how to solve it. Can someone please help me?

Give the solution in radians which is in the second quadrant for the equation
4 sin(x) = 1.8

2. Mar 10, 2007

### Gib Z

$$4\sin x =1.8$$

$$\sin x = \frac{9}{20}$$

$$x = \arcsin(\frac{9}{20})$$

That answer will give you the solution in the first quadrant.

Use the fact $$\sin (\pi - x) = \sin x$$ to finish off.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook