Saved Bookmarks
| 1. |
Prove that: (i) cos245∘−sin215∘=√34 (ii) Sin2(n+1)A−sin2nA=sin(2n+1)AsinA |
|
Answer» Prove that: (i) cos245∘−sin215∘=√34 (ii) Sin2(n+1)A−sin2nA=sin(2n+1)AsinA |
|