- #1
xLaser
- 54
- 0
I can't get these 3 questions, can someone help me?
1. cotB [ (tanA + TanB) / (cotA+cotB) ] = tan A
2. (sin^2A + 2cosA - 1) / (2 + cosA - cos^2A) = 1 / (1+ secA)
3. cos^3A + sin^3A = (cosA+SinA)(1-SinAcosA)
please help out on these, thanks in advance. U can write the / sign as fractions because i can't do it on the computer here.
1. cotB [ (tanA + TanB) / (cotA+cotB) ] = tan A
2. (sin^2A + 2cosA - 1) / (2 + cosA - cos^2A) = 1 / (1+ secA)
3. cos^3A + sin^3A = (cosA+SinA)(1-SinAcosA)
please help out on these, thanks in advance. U can write the / sign as fractions because i can't do it on the computer here.