1. 1
2. -1
3. 1/2
4. -1/2
-1
1. 1
2. 2
3. 3
4. 4
1
1. 2
2. -2
3. 3
4. -4
2
1. 0
2. 1
3. 2
4. 1/2
2
1. (1+ tan α) / (1-tan α)
2. (1+ tan α) / (1+tan α)
3. (tan α) / (1+tan α)
4. tan α / (1-tan α)
(1+ tan α) / (1+tan α)
1. 0
2. 1
3. -1
4. 2
-1
1. (m+n)/(1-mn)
2. (m-n)/(1-mn)
3. (m+n)/ (1+mn)
4. (m-n)/(1+mn)
(m+n)/(1-mn)
1. (1+pq)/(p-q)
2. (1+pq)/(p+q)
3. (1-pq)/(p-q)
4. (1-pq)/(p+q)
(1+pq)/(p-q)
1. 0
2. 1
3. -1
4. 2
1
1. 6
2. 4
3. 7
4. 5
7