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| 1. |
If sinA + cosA =√3, then prove tanA + cotA=1 |
| Answer» (SinA+CosA)^2=(√3)^2SinA^2+cos^2A+2SinA.CosA=31+2SinA.CosA=3SinA.CosA=1To prove =TanA+CotA=1SinA/CosA+CosA/SinA=1Sin^2A+cos^2A/SinA.CosA=11/1=1 (prooved) | |