Problem

Find all solutions to 2sin(θ)=3 on the interval 0θ<2π
θ=

Give your answers as exact values, as a list separated by commas.
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Answer

The solutions to 2sin(θ)=3 on the interval 0θ<2π are θ=4π3,5π3.

Steps

Step 1 :Given the equation is 2sin(θ)=3. We need to find all solutions for θ in the interval 0θ<2π.

Step 2 :Simplify the equation to sin(θ)=32.

Step 3 :sin(θ) is negative in the third and fourth quadrants.

Step 4 :The reference angle for 32 is π3 or 60.

Step 5 :The solutions in the third and fourth quadrants would be π+π3 and 2ππ3 respectively.

Step 6 :The exact values of θ in the third and fourth quadrants would be 4π3 and 5π3 respectively.

Step 7 :The solutions to 2sin(θ)=3 on the interval 0θ<2π are θ=4π3,5π3.

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