How do I find the period of y = -2 cos 0.5x
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Hey there! I'm happy to help!
is the same thing as 1/a². So,
is 1/25. This is multiplied by 3² which is 9, so this is 9/25.
In the denominator, we have , which is 1/5. We multiply this by 3, which is 3/5.
So, we divide 9/25 by 3/5, giving us 3/5.
Now, we raise this to the power of -2, so we flip the numerator and denominator and then square both numbers, giving us 25/9.
Have a wonderful day! :D