# Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number. (tan(41)-tan(11))/(1+tan(41)\tan(11))

Use an Addition or Subtraction Formula to write the expression as a trigonometric function of one number.
$\frac{\mathrm{tan}\left({41}^{\circ }\right)-\mathrm{tan}\left({11}^{\circ }\right)}{1+\mathrm{tan}\left({41}^{\circ }\right)\mathrm{tan}\left({11}^{\circ }\right)}$
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Given expression
$\frac{\mathrm{tan}\left({41}^{\circ }\right)-\mathrm{tan}\left({11}^{\circ }\right)}{1+\mathrm{tan}\left({41}^{\circ }\right)\mathrm{tan}\left({11}^{\circ }\right)}$
By the trigonometric identity