Isabel is saving money to buy a game. The game costs $8 , and so far she has saved one-fourth of this cost. How much money has I
2 answers:
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Answer:
Step-by-step explanation:
The given trigonometric equation is .
We can either use the Pythagorean identity or the right angle triangle to solve for .
According to the Pythagorean identity,
Recall that, the cosine function is an even function, therefore
.
We substitute this value in to the above Pythagorean identity to get;
But we were given that,
, so we choose the negative value.
The correct answer is B
The first 5 outputs are:
As you can see, the outputs keep doubling each time we increment x by 1.
This can be written formally, observing that if you know the value of , the next value will be
So, again, we've shown that the next value is twice the previous one, so you have