if tan x=3 than sin2x/cosx=
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Step-by-step explanation:
sin2x/cosx= 2 sinx cosx/cosx
= 2 tanx cosx
= 2 (3) cosx
= 6 cosx
= 6* 1/ √(1+tan²x)
= 6/√(1+3²)
= 6/√10
= 1.897(appox)
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