# How do I solve sec(2x)-7=0 for the four smallest positive solutions?

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More specifically, I have no clue how to get rid of the #sec# of the equation.

More specifically, I have no clue how to get rid of the

##### 1 Answer

Jun 27, 2018

#### Explanation:

sec 2x = 7

cos 2x = 1/(sec 2x) = 1/7

Calculator and unit circle give 2 solutions for 2x:

a.

If k = 0 -->

If k = 1 -->

b..

The 2 smallest positive answers are: