Question

cos 30d/sin 10d + cos 59d/sin 31d =?

a) 1 b)2 c)3 d)4

Answer 1

Hi ,

I think there is an error in the

problem.

it may be ,

Cos 30 / sin60 + cos 59 / sin 31

= cos (90-60)/sin60 + cos(90-31)/sin31

= sin60 / sin60 + sin31 / sin31

= 1 + 1

= 2

Therefore,

Option ( b ) is correct.