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![](https://prealliance-textbook-qa.oneclass.com/qa_images/homework_help/question/qa_images/24/2496200.png)
I know the answer is as follows but I cannot work out the steps involved, it"s killing me! Thank you in advance.
![](https://prealliance-textbook-qa.oneclass.com/qa_images/homework_help/question/qa_images/24/2496201.png)
d) Simplify cos(1800 0) Show transcribed image text
I know the answer is as follows but I cannot work out the steps involved, it"s killing me! Thank you in advance.
d) Simplify cos(1800 0)
Show transcribed image text Patrina SchowalterLv2
5 Mar 2019