Hi , can anyone help please?
7) Given triangle ABC alongside
a) Determine an expression...
Mathematics, 11.09.2021 14:00 math9878
Hi , can anyone help please?
7) Given triangle ABC alongside
a) Determine an expression for Angle A in terms of B and C
the answer here is A = 180° - B - C
I'm just not sure how to answer b!
b) Hence, prove that cos A = sin B sin C - cos B cos C
Answers: 2
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