Question

cos {2[ tan -1 1\4 + Tan -1 2\9 ]} = 3\5​

Answer 1

Answer:

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Avul Pakir Jainulabdeen Abdul Kalam was an Indian aerospace scientist and politician who served as the 11th President of India from 2002 to 2007. He was born and raised in Rameswaram, Tamil Nadu and studied physics and aerospace engineering