Use double angle identity:
After substituting and moving to Right side of equation:
This is a quadratic, which can be solved by factoring or quadratic formula.
It may be helpful to replace sin(x) with another variable, then solve.
Now substitute sin(x) back in, we have
Using a unit circle or inverse sine function in calculator we can find the appropriate angles.
After substituting and moving to Right side of equation:
This is a quadratic, which can be solved by factoring or quadratic formula.
It may be helpful to replace sin(x) with another variable, then solve.
Now substitute sin(x) back in, we have
Using a unit circle or inverse sine function in calculator we can find the appropriate angles.