In a right angled triangle ABC, right angled B, if cot A=1, prove that 2 sin A cos A=1. Please answer step by step Share with your friends Share 1 Roopam Pandey answered this Dear student,givencotA=1we know thatcot45°=1cotA=cot45°⇒A=45°Now,2sinAcosA=2 sin45° cos45°=2×12×12=2×12=12sinAcosA=1Hence provedRegards 1 View Full Answer