CBSE Class 10 Answered
Please observe the question carefully and then answer :
cos^4A/cos^2B + sin^4A/sin^2B=1 then prove that : cos^4B/cos^2A + sin^4B/sin^2A =1
Asked by guptaabhinav0809 | 28 Feb, 2019, 09:59: AM
Expert Answer
since A = B, in the given eqn. , if we replace A = B, Then we get
Answered by Thiyagarajan K | 28 Feb, 2019, 12:59: PM
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