(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Here is the question given:

A blade for a lawnmower consists of two parts made of the same material and joined together as shown:

The length OP is one unit in length and MPQN is square in shape.

Develop an equation for the cross-sectional area of the blade and find the magnitude of angle ∅ to give the area of the blade.

2. Relevant equations

sin 2 ∅ = 2 ((sin ∅) (cos ∅)

3. The attempt at a solution

Attempt? I've tried deriving the double angle equation but cant get anywhere... :( basically there is only one known piece of info (in the hypotenuse being one unit in length)...

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# Homework Help: Trigonometric Identity: Double Angle.

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