Simplify cos- - cos- 2 - sin- - sin- 2 reduces to -

( cosα #160; cosβ)^2 + ( sinα #160; sinβ)^2 cos ^2α #160; + cos ^2β #160; 2cosαcosβ #160; + sin ^2α #160; + sin ^2β #160; 2sinαs ...

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Equal Angles Subtend Equal Sides

Simplify co...

Question

Simplify $(cos α - cos β)^{2} + (sin α - sin β)^{2}$ reduces to :

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(cos α - cos β)^{2} + (sin α - sin β)^{2}

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{(cos α - cos β)}^{2} + {(sin α - sin β)}^{2} = 4 {sin}^{2} {(α - β) / 2}

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