#### Question

In Δ ABC with the usual notations prove that `(a-b)^2 cos^2(C/2)+(a+b)^2sin^2(C/2)=c^2`

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Solution for question: In Δ ABC with the usual notations prove that (a-b)^2 cos^2(C/2)+(a+b)^2sin^2(C/2)=c^2 concept: Trigonometric Functions - Solution of a Triangle. For the courses HSC Arts, HSC Science (Computer Science), HSC Science (Electronics), HSC Science (General)