Teaching HSSC TGT 2023 Mock Test (Latest Pattern) Quantitative Aptitude Trigonometry

If two angles of a triangle are cot-1 2 and cot-1 3, then its third angle is - 

1
\(5 \pi \over6\)
2
\( \pi \over2\)
3
\( \pi \over4\)
4
\( 3\pi \over4\)
5
Not Attempted
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