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| 1. |
Tan A + secA -1 upon tan A - sec A+ 1 = 1 + sin A upon |
| Answer» Tan + sec - 1--------------------Tan - sec + 1Tan + sec - ( sec^2 - tan^2 )--------------------------------------------Tan - sec + 1(Tan + sec) - ( sec + tan ) (sec - tan )--------------------------------------------------------Tan - sec + 1(sec + tan )(1 - sec + tan )------------------------------------------tan - sec + 1Sec + tan1/cos + sin/cos 1 + sin----------- proved....cos | |