Question
Sun May 20, 2012 By: Vaishnavi Sankeet

prove that ,cosecsquare.(1+cos) (1-cos)= lamada

Expert Reply
Sun May 20, 2012
cosec2A (1+cosA)(1-cosA)
= cosec2A (1-cos2A)
= cosec2A (sin2A)
= 1/ sin2A * sin2A
= 1
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