cosacosb-sinasinb
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| Prove that: (i) cos(A-B)= cosAcosB + sinAsinB (ii)cos(A+B)= cosAcosB - sinAsinB |
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1 | 1763 | June 20, 2019 |
| Topic | Replies | Views | Activity | |
|---|---|---|---|---|
| Prove that: (i) cos(A-B)= cosAcosB + sinAsinB (ii)cos(A+B)= cosAcosB - sinAsinB |
|
1 | 1763 | June 20, 2019 |