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COMEDK2015MathematicsTrigonometric Ratios & Identities

In a A B C, cosec A( B C+ B C)=

Options

  1. A0
  2. B1
  3. C-1
  4. DNone of these

Correct answer

B. 1

Step-by-step solution

cosec A( B C+ B C) aligned &= cosec A (B+C) &= cosec A (180^ -A ) & [ A, B and C are angles of a triangle ] &= 1 A A=1 aligned

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