Question

Find thevalue of cos 80 by sin 10 + cos59 . Cosec 31

Answer 1

$\frac{ \cos(80) }{ \sin(10) } + \cos(59 ) \times \csc(31)$

$\frac{ \cos(80) }{ \cos(80) } + \cos(59) \times \sec(59)$

$1 + \cos(59) \times \frac{1}{ \cos(59) }$

=1+1

=2