A geometry problem by Aakhyat Singh

Geometry Level pending

(cos(A))^2+(cos(B))^2-(2 cos(A) cos(B)*cos(A+B))=?

cos^2(A+B) -sin^2(A+B) sin^2(A+B) -cos^2(A+B)

Aakhyat Singh by Aakhyat Singh , 20, India

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1 solution

Aakhyat Singh
Oct 13, 2017

@Ananya Agrahari , @Marios Patsios , how did u do this problem ? Could you please post ur solution to this problem?

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