prove that cos40=cos(-40)
Answers
Answered by
0
If you look at the graph of cos x, its symmetric about the y axis, i.e if you put two fingers on x=0 and move one towards right and one towards left you will get same values of y.
Therefore
cos x = cos (-x)
Therefore
cos x = cos (-x)
Attachments:

Similar questions
History,
9 months ago
Chemistry,
9 months ago
Business Studies,
9 months ago
Math,
1 year ago
Physics,
1 year ago