1. π/2
2. π/4
3. π/3
4. π/6
π/4
1. 1
2. 2
3. 5
4. 4
2
1. 3
2. 4
3. 5
4. 0
3
1. -8
2. -1
3. 3
4. 9
-8
1. a/c
2. -b/c
3. c/a
4. b/a
-b/c
1. π/3
2. π
3. 2π
4. 2π/3
2π/3
1. -1
2. 1
3. 2
4. 3
1
1. tanh-1x
2. sinh-1x
3. cosh-1x
4. tanh x
tanh<sup>-1</sup>x
1. 2
2. a+b+c
3. 1
4. ab+bc+ca
1
1. h cotα
2. h tanα
3. h cosα
4. h sinα
h cotα