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ICSE Class 10 Answered

cot^2A -cos ^2A =cos ^2A ×cot ^2A
Asked by dantkalesamarth | 22 Nov, 2018, 10:03: PM
answered-by-expert Expert Answer
cot2 A - cos2 A 
= cos2 A/sin2 A - cos2 A
= (cos2 A - cos2 A sin2 A)/sin2 A
cos2 A (1 - sin2 A)/sin2 A
=  (cos2 A/ sin2 A) cos2 A               1 - sin2 A = cos2 A
= cot2 A cos2 A     
Answered by Sneha shidid | 23 Nov, 2018, 09:29: AM
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