Find the values of : cosec 780° - Vidyadip

Question

Find the values of : cosec 780°

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Answer

\begin{aligned}
& \operatorname{cosec} 780^{\circ}=\operatorname{cosec}\left(720^{\circ}+60^{\circ}\right) \\
& =\operatorname{cosec}\left(2 \times 360^{\circ}+60^{\circ}\right) \\
& =\operatorname{cosec} 60^{\circ} \\
& =\frac{2}{\sqrt{3}} \\
\end{aligned}

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