What is the result of adding vector A(3, -2) and vector B(4, 7)?
+
What is the speed in km/h if a distance of 100 km is covered in 2 hours?
+
What are the characteristics of the cosine function f(x) = cos x? How does it relate to the unit circle? What is its period, amplitude, and range? How is it different from the sine function? How many x-intercepts does it have in one full period?