hey guys need help..........
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m2-n2=(m+n)(m-n)
=2tan2sin
=4tansin
4√mn=4√tan2-sin2
=4√sin2(sin2)/cos2
=4sin. sin/cos
=4tansin
m2-n2=4√mn
=2tan2sin
=4tansin
4√mn=4√tan2-sin2
=4√sin2(sin2)/cos2
=4sin. sin/cos
=4tansin
m2-n2=4√mn
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