1. α2
2. 0
3. -α2
4. α
-α<sup>2</sup>
1. ±1
2. 0
3. ±2
4. ±4
±4
1. -1, 1
2. -2, 2
3. -3, 3
4. -4, 4
-1, 1
1. 2a/a+1
2. 2a/a-1
3. a/a+1
4. a/a-1
2a/a-1
1. cot B
2. cot 2B
3. tan 2B
4. tan B
tan B
1. 1
2. 2
3. 0
4. 3
1
1. {2nπ ± π/6 : n Є Z }
2. {2nπ ±π/3 : n Є Z }
3. {2nπ ±π/2 : n Є Z }
4. {2nπ ± π/4 : n Є Z }
{2nπ ± π/4 : n Є Z }<br>
1. 0
2. π/3
3. π/4
4. π/2
π/2
1. 0
2. log 2
3. log 3
4. log 4
log 3
1. a
2. b
3. c
4. a + b + c
a