Find the length of the side YZ ... {cos~25\circ}\) We obtain the value of cos 25° by using the cos button on the calculator, followed by 25. This gives us: hypotenuse = 5.516889595 cm.

This circle has the centre at the origin and a radius of 1 unit. The point P can move around the circumference of the circle. At point P the \(x\)-coordinate is \(\cos{\theta}\) and the \(y ...