Rohtas District Magistrate Deepak Kumar Mishra arrived at the blackboard with chalk and began teaching the children trigonometry. He explained perpendicular, hypotenuse, and base, along with sine, cosine, and ten theta.
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Rohtas District Magistrate Deepak Kumar Mishra arrived at the blackboard with chalk and began teaching the children trigonometry. He explained perpendicular, hypotenuse, and base, along with sine, cosine, and ten theta.