AM-2541

Addition formulae

A Math · Secondary 4 · Medium · Addition formulae

Angles

P, Q

and

R

of a triangle satisfy

P+Q+R=180^\circ

. Given that

\sin(P+Q)=\dfrac{3}{5}

, find the exact value of

\tan R

.

$-\dfrac{3}{4}$
$\dfrac{3}{4}$
$-\dfrac{4}{3}$
$\dfrac{4}{3}$

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