28)) If `a^2+b^2=1, m^2 +n^2=1, then`
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Channel: Doubtnut · 2018 · Education
To ask Unlimited Maths doubts download Doubtnut from - https://goo.gl/9WZjCW 28)) If `a^2+b^2=1, m^2 +n^2=1, then`
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