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If (sin A-sinC)/(cosC-cosA)=cotB then an...

If `(sin A-sinC)/(cosC-cosA)=cotB` then angles A,B,C are in

A

A.P

B

G.P

C

H.P

D

A.G.p

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AAKASH SERIES-TRANSFORMATIONS AND INDENTITIES-PRACTIVE EXERCISE
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