19. If tanA=5/6 tan B=1/11 then prove that A+B=/4

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Q. If

t a n A = \frac{5}{6}

t a n B = \frac{1}{11}

, prove that :

A + B = \frac{π}{4}

Q. If tan

A = \frac{5}{6},

tan

B = \frac{1}{11},

prove that :

A + B = \frac{π}{4}

(i) If $t a n A = \frac{5}{6}$ and $t a n B = \frac{1}{11},$ prove that A+B= $\frac{π}{4}$
(ii) If $t a n A = \frac{m}{m - 1}$ and $t a n B = \frac{m}{2 m - 1}$
then prove that $A - B = \frac{π}{4}$

Q. If A + B = 225 , prove that tan A + tan B = 1 tanA tanB

Q. (i) If

\tan A = \frac{5}{6} and \tan B = \frac{1}{11}

, prove that

A + B = \frac{π}{4}

.
(ii) If

\tan A = \frac{m}{m - 1} and \tan B = \frac{1}{2 m - 1}

, then prove that

A - B = \frac{π}{4}

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