α and β are the positive acute angles and satisfying equations 5sin2β=3sin2α and tanβ=3tanα simultaneously. Then the value of tanα+tanβ is ________ .
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answer is 4.
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Detailed Solution
5×2tanβ1+tan2β=3×2tanα1+tan2αor 5tanβ1+tan2β=3tanα1+tan2α(i)Substituting tanβ=3tanα we have 5×3tanα1+9tan2α=3tanα1+tan2α or 5+5tan2α=1+9tan2α or 4tan2α=4 or tanα=1, i.e., tanβ=3∴ tanα+tanβ=4