cos (225°) =

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Solution

The correct option is A

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Similar questions

What is Cos(225)°?

cos 225^{\circ} - sin 225^{\circ}

Evaluate:

${cos}^{2} 25^{\circ} - {sin}^{2} 65^{\circ} - {tan}^{2} 45^{\circ}$

cos 225^{\circ} - sin 225^{\circ} + tan 495^{\circ} - cot 495^{\circ}

\frac{s i n (- 660^{\circ}) t a n (1050^{\circ}) s e c (- 420^{\circ})}{c o s (225^{\circ}) c o s e c (315^{\circ}) c o s (510^{\circ})} =

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