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Question

Express 
(sin 75+cosec 75)
in terms of trigonometric ratios of angles between 0 and 45.
 
  1. (sec 15+sin 15)
  2. (cos 45+sec 45)
  3. (cos 15+sec 15)
  4. (cos 25+sec 25)


Solution

The correct option is C (cos 15+sec 15)
sin 75+cosec 75

=sin(9015)+cosec(9015)

=(cos 15+sec 15)

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