1. 2
2. -2
3. 4
4. -4
-2
1. a circle
2. a straight line
3. a parabola
4. an ellipse
a circle
1. -1
2. 1
3. 2
4. -2
-2
1. 2π
2. π
3. π/5
4. 2π/5
2π/5
1. 7
2. 8
3. 13
4. 11
11
1. [7/8 , 5/4]
2. [1/2 , 5/8]
3. [1/4 , 1]
4. [1/4 , 1/2]
[1/4 , 1]
1. nπ + 7 π/4
2. 2nπ + 7π/4
3. nπ + (-1)n 7π/4
4. 7nπ / 4
2nπ + 7π/4
1. -1
2. 1
3. 0
4. π√(5/8)
-1
1. log(cot x/2)
2. log(tan x/2)
3. log(1 + cot x)
4. log(1 + tan x)
log(cot x/2)
1. an arithmetic progression
2. an geometric progression
3. a harmonic progression
4. an arithmetic-geometric progression
an arithmetic progression