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Question

If x= 20, evaluate : 12sin3x2cos3x+5tan(2x+5)3cot23x.
  1. 7
  2. 3
  3. 9
  4. 10

A
9
B
10
C
7
D
3
Solution
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12sin3x2cos3x+5tan(2x+5)3cot23x
Put x=20

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