ShynastieMO18
New member
- Joined
- May 12, 2012
- Messages
- 1
Can anyone help me with these trig identities?
1. Find sin(A+B) if SinA= 2/5 and SinB=1/4 where A and B are in quadrant I.
2.Find cos(A-B) if SinA=2/7 and SinB=1/3 where A and B are in quadrant I.
3. Find tan(A+B) if sinA=-2/3 and SinB=4/5 where A is in quadrant III and B is in quadrant II.
1. Find sin(A+B) if SinA= 2/5 and SinB=1/4 where A and B are in quadrant I.
2.Find cos(A-B) if SinA=2/7 and SinB=1/3 where A and B are in quadrant I.
3. Find tan(A+B) if sinA=-2/3 and SinB=4/5 where A is in quadrant III and B is in quadrant II.