Question

if cosx=1/3 and 0<=beta<=90 what is the value of sin?

Answer 1

Here are a couple hints:

1. If \(\cos\beta = 1/3\) and \(0\leq \beta\leq 90\), then \(\sin\beta\geq 0\).
2. Recall that \(\sin^2\beta+\cos^2\beta = 1\).

Can you take things from here?