Question

If cos2B = COS(A+C)/cos(A-C)
, then tan A, tan B, tan C are in

a) AP
b) GP
c) HP​

Answer 1

Answer:

answer is in HP

if we use CD formula

on RHS

then we can find the relationship with angle B

then it is applicable to HP

Step-by-step explanation:

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Answer 2

Answer:

HP IS THE RIGHT ANSWER

Step-by-step explanation:

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