SASMO 2018 Secondary 4 (Grade 10) Contest Question 4

Question 4

Which of the following is always true about a basic trigonometric function?

1. The sine function gives any integer value.
2. The cosine of 90 degrees is 1.
3. The tangent of 0 degrees is undefined.
4. The minimum value of the cosine function is -1.
5. The tangent function is always positive.