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## Homework Statement

Show that sin 600° . cos 330° + cos 120° . sin 150° = - 1

## Homework Equations

I know that sinΘ = opposite/hypotenuse and cosΘ = adjacent/hypotenuse.

## The Attempt at a Solution

I am equipped with knowledge about what sinΘ and cosΘ is from right angled triangle.

I stand in front of a wall and visualize opposite side, adjacent side and hypotenuse but I am unable to clearly picture what sin 600° . cos 330° + cos 120° . sin 150° = - 1 mean.

What is the meaning of the equation?

What is the meaning of -1 on the right hand side of the equation?