Guest

Show that sin 23 degrees + sin 37 degrees = cos 7 degrees

Show that sin 23 degrees + sin 37 degrees = cos 7 degrees

Grade:11

1 Answers

Vikas TU
14149 Points
7 years ago
Dear Varad,
Apply sinc + sind formulae:
SinC + SinD = 2Sin[(C+D)/2]Cos[(C-D)/2]
thus it becomes, = > 2sin30cos7 = 2*cos7/2 = cos7

Think You Can Provide A Better Answer ?

ASK QUESTION

Get your questions answered by the expert for free