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EXAMPLE 7

Solve : 5 sec 3 x + tan2 x - 7 = 0

Solution :

5 sec2x + tan2x - 7 = 0

5 (1 + tan2x) + tan2x-7 = 0 ....(sec2x = 1 + tan2x)

5 + 5 tan2x + tan2 x -7 = 0

6 tan2x - 2 = 0

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Index

6.1 Inverse Functions
6.2 Trignometric Equations
Supplementary Problems

Chapter 7

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