COS

COS helps you return the cosine value of a number in a worksheet. It provides the tools you need to enter the function, review its syntax, and troubleshoot calculation issues, making your work more efficient and helping you accomplish tasks with ease. With COS, you can insert the function through the function dialog, type =COS(...) directly in a cell or formula bar, view the syntax COS(number), and open detailed help for parameter guidance. Whether you're checking parameter requirements, fixing #VALUE! errors caused by text or spaces, verifying unexpected results, or filling the formula across multiple cells while managing relative and absolute references, COS helps you stay productive and complete tasks efficiently across different devices and work environments. Choose the documentation below that best matches your needs to learn more.