CBSE Class 10 Answered
Answer this board question plzzzz.......
Asked by Annette | 13 Mar, 2010, 02:57: PM
Expert Answer
cotA=8/x
cosecA=8x
Square the second given equation, and subtract 1 from both sides,
cosec2A = 64x2
cosec2A - 1= 64x2 - 1
cot2A = 64x2 - 1 ... using 1+cot2A = cosec2A
64/x2 = 64x2 - 1 ... but cot2A = 64/x2, from first given equation,
64(x2 - 1/x2) = 1
16x4(x2 - 1/x2) = 1
4(x2 - 1/x2)= 1/16
Regards,
Team,
TopperLearning.
Answered by | 13 Mar, 2010, 04:59: PM
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