Frank has four different credit cards, the balances and interest information of which are outlined in the table below. He would
2 answers:
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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.