1. The trigonometric expression, cos70° cos40° - sin70° sin40° is also equal to which of the following?
2. Which of the following represents the expression, 2sinA – sin2A?
3. Which of the following is (cot x)/ (cosec x) equal to?
4. In the third quadrant, which among the following trigonometric functions is positive?
5. What is the radian measure of the angle 240°?