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CBSE Class 10 Answered

prove that ,cosecsquare.(1+cos) (1-cos)= lamada
Asked by vaishnavi sankeet | 20 May, 2012, 09:48: PM
answered-by-expert Expert Answer
cosec2A (1+cosA)(1-cosA)
= cosec2A (1-cos2A)
= cosec2A (sin2A)
= 1/ sin2A * sin2A
= 1
Answered by | 20 May, 2012, 09:56: PM

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