# If sin =0.45, what is cos(pi/2-theta)?

Jul 28, 2016

0.45

#### Explanation:

This answer comes from the trigonometric identity that states:
$\cos \left(\frac{\pi}{2} - \theta\right) = \sin \left(\theta\right)$

https://www.algebra.com/algebra/homework/Trigonometry-basics/Trig-identities.lesson

this may help to further your understanding.