cot(A/2)- tan(A/2) equal to what?
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Answer:
2cotA
Step-by-step explanation:
=Cos(A/2)/sin(A/2)-Sin(A/2)/Cos(A/2)
=Cos^2(A/2)-Sin^2(A/2)/sin(A/2)-cos(A/2)
=CosA/Sin(A/2)-Cos(A/2)
=2 cosA/2 sin(A/2)-cos(A/2)
=2 cosA/sinA
=2 cotA
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