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question mark

If angle A is between 0 and 90 degree then the value of
½ cot A [1-(sec A – tan A)2 / cosec A(sec A – tan A)] is
Options are
a) 2 b)0 c) 1 d)1/2

ABHISHEK VASHIST , 10 Years ago
Grade 12th pass
anser 1 Answers
PASUPULETI GURU MAHESH
THE ANSWER IS D  SINCE  IF A=300
THEN½  cot A  [1-(sec A – tan A)/ cosec A(sec A – tan A)]
=1/2(root 3)[1-((2/root3)-(1/root3))2] / (2(2/root3)-(1/root3))
simplify that you get 1/2
Last Activity: 10 Years ago
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