tan (π/4+x/2) + tan (π/4-x/2)
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hey
for this question you have to use the formula of tan(A + B) = tanA + tanB / 1 - tanAtanB
and for tan(A - B) = tanA - tanB/ 1 + tanAtanB
for this question you have to use the formula of tan(A + B) = tanA + tanB / 1 - tanAtanB
and for tan(A - B) = tanA - tanB/ 1 + tanAtanB
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