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ConceptTrigonometric Functions - Solution of a Triangle

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#### Question

In ΔABC, prove that : `tan((a-b)/2)=(a-b)/(a+b)cotC/2`

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In ΔABC with usual notations, prove that 2a `{sin^2(C/2)+csin^2 (A/2)}` = (a + c - b)

Solution for concept: Trigonometric Functions - Solution of a Triangle. For the courses 12th HSC Arts, 12th HSC Science (Computer Science), 12th HSC Science (Electronics), 12th HSC Science (General)