Question

If (seca + tana) (secß + tanß) (secy + tany)= tana tanß tany
then value of (seca -tana) (secß-tanß)(secy - tany) equal to
(A) tana tanß tany
(B) cota cotß coty
(C) tana + tanß + tany
(D) cota + cotß + coty

pls give correct answer with steps...​

Answer 1

Answer:

option (b)

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