Factor the equation: Factor the equation to find common terms.We can factor sin(θ) out of the equation:sin(θ)(4sin(θ)−7)=0
Set equal to zero: Set each factor equal to zero to find the solutions.sin(θ)=0 and 4sin(θ)−7=0
Solve sin(θ)=0: Solve the first equation sin(θ)=0. The solutions to sin(θ)=0 are θ=kπ, where k is any integer.
Solve 4sin(θ)−7=0: Solve the second equation 4sin(θ)−7=0.First, add 7 to both sides:4sin(θ)=7Then, divide both sides by 4:sin(θ)=47However, since the sine function has a range of [−1,1], there are no solutions to sin(θ)=47. This is not a valid solution.