Question

iii)
sin e + sin 30+ sin 50+ sin 70
cos 0 + cos 30+ cos 50+ cos 70 – tai
fan 4A
Prove that.​

Answer 1

Answer:

sin 70 + cos 40/cos 70 + sin 40

= sin (90-70) + cos 40 / cos (90-70) + sin 40

=cos 20+ cos 40 / sin 20 + sin 40

= cos 60/sin 60

=1/2 / root 3/2

=1/ root 3

Answer 2

Answer:

1/ROOT3

HOPE THAT HELPS