Give the solution of Qno. 3 Qno.5 Qno. 10

​Q3. Find the distance between the points (a cos 45°, 0) and (0 , a cos 45°)

​Q5. A number X is chosen from the numbers –5, –4, –3, –2, –1, 0 , 1, 2, 3, 4, 5. What is the provability that 1  x 1 < 4?

Q10. If Cos A – sin A = 1, prove that Cos A + sin A = $\pm$1.