# Math Help - Calculate angle

1. ## Calculate angle

$sin(\theta ) cos( \theta) = 0,7$

What is the value of $\theta$ ?

2. Originally Posted by Apprentice123
$sin(\theta ) cos( \theta) = 0,7$

What is the value of $\theta$ ?
Use the identity $sin \theta cos \theta = \frac{1}{2}sin(2\theta)$

3. the solutions to this are imaginary

$sin^{-1}\left(1.4\right)$ is non real