sina-sin-60-asin60a
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| Proove that: sinA.sin(60-A)sin(60+A)=1/4.sin3A? |
|
1 | 2875 | June 28, 2019 |
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| Proove that: sinA.sin(60-A)sin(60+A)=1/4.sin3A? |
|
1 | 2875 | June 28, 2019 |