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| 1. |
If sec¶=x+1/4x then prove that sec¶+tan¶=2x or 1/2x |
| Answer» Tan2= sec2-1 =(x+1/4x)square-1 =x2+1/16x2-1/2(by a2+b2=(a+b)2-2ab)We get, (x-1/4x)=tanSec+tan=x+1/4x+x-14x =2x | |