4 Written Questions

1. SinxCosy+CosxSiny
2. 1
3. 2Cos²x-1
4. 1-2Sin²x

4 Multiple Choice Questions

1. Cos²x-Sin²x
   1. Sin2x
   2. 1+cot²x
   3. Cot
   4. Cos2x
2. CosxCosy-SinxSiny
   1. Cot
   2. Sin (x+y)
   3. Cos2x
   4. Cos (x+y)
3. 2SinxCosx
   1. Sin2x
   2. Cot
   3. Tan
   4. Cos2x
4. Sin/Cos
   1. Cot
   2. Sin2x
   3. 1+tan²x
   4. Tan

3 True/False Questions

1. Cot → Sin/Cos

   True        False

2. 1+tan²x → csc ²x

   True        False

3. 1+cot²x → sec²x

   True        False