Question

find value: sin 20° + sin 40° + sin 60° + sin 80° + sin 100° / cos 110° + cos 130° + cos 150° + cos 170° + cos 190°​

Answer 1

Answer:

cos 532 °

Step-by-step explanation:

is it correct

I understood like this

Answer 2

Answer:

sin 20° + sin 40° + sin 60° + sin 80° + sin 100° / cos 110° + cos 130° + cos 150° + cos 170° + cos 190°

= sin 20° + sin 40° + sin 60° + sin 80° + sin 100° / cos (90+20)° + cos (90+40)° + cos (90+60)° + cos (90+80) + cos (90+100)°

= sin 20° + sin 40° + sin 60° + sin 80° + sin 100° / -sin 20° - sin 40° - sin 60° - sin 80° - sin 100°

=1/-1

= -1