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SIN PI /14 X SIN 3 PI / 14 X SIN5PI/14 X SIN7PI/14 X SIN9 PI/14 X SIN 11PI /14 X SIN 13PI/14=_________________
  1. 1/8
  2. 1/16
  3. 1/32
  4. 1/64
PLZZ GIVE SMALL SOLN ACCORDING TO JEE

KRISHA SHETH , 7 Years ago
Grade 11
anser 1 Answers
Saurabh Koranglekar

Last Activity: 6 Years ago

combine first and last term then 2ndand 2ndlast term and so on and use sin(A)* sin(B) = (0.5)*((cos A+B)-cos(A-B))

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