1.
2.
3.
4.
1. πa/4
2. πa2/4
3. 3πa2/4
4. πa/2
πa2/4
1. 3π/16
2. 3π2/16
3. 16π2/3
4. 16π/3
3π<sup>2</sup>/16
1. 0
2. 1
3. -1
4. -2
0
1. equilateral triangle
2. isosceles triangle
3. right angled isosceles triangle
4. right angled triangle
right angled triangle
1.
2.
3. y
4.
y
1. (7, 10)
2. (10, 7)
3. (10, -7)
4. (-10, 7)
(10, -7)
1. cot θ
2. sin θ
3. cos θ
4. tan θ
tan θ
1. cos2θ+1
2. cot4θ
3. cot3θ
4. 2cotθ
cot<sup>3</sup>θ
1. 1 ≤ A ≤ 2
2. (3/4) ≤ A ≤ 1
3. 0 ≤ A ≤ 1
4. (1/4) ≤ A ≤ (1/2)
(3/4) ≤ A ≤ 1