Question

What is the smallest possible value for a where y = sin 2a reaches its maximum?

Answer 1

Answer: 45°

Step-by-step explanation:

Maximum value of sina = 1

sin2a = 1

sin2a = sin90

2a = 90°

a = 45°

Answer 2

Answer:

Step-by-step explanation:

sin 2a reaches its maximum when sin 2a = 1, that is when

2a = pi /2 + 2 k pi, where k is a integer.

now if a > 0, then the least value of a is pi/ 4.