Math, asked by ristag, 1 month ago

helpp!!!
prove that:
cosecA-cotA= tanA/2

Answers

Answered by ravi2303kumar
4

Step-by-step explanation:

to prove : cosecA-cotA= tan(A/2)

LHS =  cosecA-cotA

       = cosecA-cotA * [(cosecA+cotA)/(cosecA+cotA)]

       = [(cosecA+cotA)(cosecA-cotA)] / (cosecA+cotA)

       = (cosec²A-cot²A)/ (cosecA+cotA)

       = 1/ (cosecA+cotA)

       = 1/ ((1/sinA)+(cosA/sinA))

       = 1 / [(1+cosA)/sinA]

       = sinA / (1+cosA)

       = tan(A/2)

       = RHS

=> LHS = RHS

hence proved

     

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