Answer:
The answer to your question is t₁ = 6 and t₂ = 30
Explanation:
4sin(5t) -1 = 1
Solve as a common equation
4sin(5t) = 1 + 1
4sin(5t) = 2
sin(5t) = 2/4
sin(5t) = 1/2
sin of 1/2 = 30° and 150° sin 30 = 1/2 and sin 150 = 1/2
Then
5t = 30° and 5t = 150°
t₁ = 30/5 t = 150/5
t₁ = 6 t₂ = 30