Saved Bookmarks
| 1. |
Prove that tan 70∘=tan 20∘+2tan 50∘. Or Prove that 1+cos2x+cos4x+cos6x=4cosx cos2x cos3x |
|
Answer» Prove that tan 70∘=tan 20∘+2tan 50∘. Prove that 1+cos2x+cos4x+cos6x=4cosx cos2x cos3x |
|