.If tanθ=1/√(3) then the value of cos2θ=
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Answer:
given tan x = 1/√3
to find the value of cos 2x
tan x = tan 30°
x = 30°
cos 2x = 2cos²- 1
=> 2 cos²30° - 1
=> 2 × (√3/2)² - 1
=> 2 × 3/4 - 1
=> 3/2 - 1
=> 1/2
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