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5 Written questions

4 Matching questions

  1. sinx - siny
  2. cos2x
  3. cot(90-x)
  4. cos(90-x)
  1. a 2cos^2x-1
  2. b sinx
  3. c 2cos1/2(x+y)sin1/2(x-y)
  4. d tanx

5 Multiple choice questions

  1. csc^2 x
  2. secx
  3. 2cos1/2(x+y)cos1/2(x-y)
  4. 2cosacosb
  5. 2sin1/2(x+y)cos1/2(x-y)

5 True/False questions

  1. sin(a+b) + sin(a-b)2sinacosb

          

  2. -cos(a+b) + cos(a-b)2sinasinb

          

  3. cos(a+b)cosacosb-sinasinb

          

  4. csc(90-x)tanx

          

  5. cos(1/2x)+-√1/2(1+cosx)