![Could someone help me solve this? I tried an integral calculator online but it gave me a solution with something called sec. I don't know what sec is, I haven't learned about Could someone help me solve this? I tried an integral calculator online but it gave me a solution with something called sec. I don't know what sec is, I haven't learned about](https://i.redd.it/xspizs23kp3a1.png)
Could someone help me solve this? I tried an integral calculator online but it gave me a solution with something called sec. I don't know what sec is, I haven't learned about
![a. The alternative version of problem (5) by Integral Calculator online... | Download Scientific Diagram a. The alternative version of problem (5) by Integral Calculator online... | Download Scientific Diagram](https://www.researchgate.net/publication/333142744/figure/fig1/AS:759228046245888@1558025480004/a-The-alternative-version-of-problem-5-by-Integral-Calculator-online-application.png)
a. The alternative version of problem (5) by Integral Calculator online... | Download Scientific Diagram
![integral sin^2(x)dx - Indefinite Integral Calculator - Symbolab | Calculator, Integration by parts, Graphing integral sin^2(x)dx - Indefinite Integral Calculator - Symbolab | Calculator, Integration by parts, Graphing](https://i.pinimg.com/originals/1c/2d/d4/1c2dd45932e341ef46381b2e57a32f1d.png)
integral sin^2(x)dx - Indefinite Integral Calculator - Symbolab | Calculator, Integration by parts, Graphing
![multivariable calculus - What does italic i mean in integral calculator? - Mathematics Stack Exchange multivariable calculus - What does italic i mean in integral calculator? - Mathematics Stack Exchange](https://i.stack.imgur.com/BnwMM.png)