Question

find the value of cosec 780​

Answer 1

$\underline{ \bold{ \large{Solution :- \: \: }}}$

$\to \bold{Cosec \: ( 780 )} \\ \\ \to \bold{ Cosec \: ( 360 × 2 + 60 )} \\ \\ \to \bold{Cosec \: (60)} \: \\ \\ \to\bold{ \frac{2}{ \sqrt{3} } }$

$\underline{ \bold{ \large{Identity \: Used :- \: \: }}}$

• Cosec ( 360 × n + Theta ) = Cosec ( Theta )

Answer 2

Step-by-step explanation:

Cosec 780 =cosec(360*2+60)

= Cosec(90*8+60)

Cosec 60