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How would I get the exact value of Tan157.5 using the half angle formula?
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How would I get the exact value of Tan157.5 using the half angle formula?

User Drewmate
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\tan(157.5)=\tan(315/2)=(\sin(315))/(1+\cos(315))=(-√(2)/2)/(1+√(2)/2)=(-1)/(1+√(2))
User Krishna Meena
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