1.
2. tan A/2
3. cot C/2
4. sin B/2
1. 3/2
2. 3/10
3. 1/8
4. does not exist
3/10
1. (x-5)2/16+(y-2)2/9=1
2. (x-5)2/16-(y-2)2/19=1
3. (x-5)2/16-(y-2)2/9=1
4. (x+5)2/26-(y+2)2/9=1
(x-5)2/16-(y-2)2/9=1
1. 0
2. 1
3. 2
4. does not exist
2
1. 3/2
2. 3/10
3. 1/8
4. does not exist
1/8
1. 3/2
2. 3/10
3. 1/8
4. does not exist
3/10
1. 2
2. -2
3. ∞
4. does not exist
does not exist
1. 1
2. -1
3. 0
4. does not exist
does not exist
1. 1
2. -1
3. 0
4. does not exist
does not exist
1. a
2. b
3. c
4.