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This question requires you to fill in the blanks. Some steps will refer to previous answers you have typed, so it is necessary to \"submit\" after filling in each blank. The quickest way to do this is hit enter after typing instead of pushing the submit button. Please see formatting instructions below the problem. Use the double angle identity $cos(2x) = cos^2(x) - sin^2(x)$ to verify the double angle identity $cos(2x) = 2 cos^2(x) - 1$ 1. The right side is more complicated so start there: Rewrite $sin^2(x)$ using the Pythagorean identity: 2. Distribute the negative sign: 3. Group like terms: Now you have: Proven! $cos(2x) = cos^2(x) - sin^2(x)$ $= cos^2(x) - ($ $cos(2x) = $ $cos(2x) = $ $cos(2x) = $ $cos(2x) = $ $cos(2x) = $ FORMATTING INSTRUCTIONS BELOW Type in lowercase and use parentheses. For example type sin(x) not sinx. For fractions use the divide symbol \"\/\" . For example sin(x)/cos(x) for $\frac{sin(x)}{cos(x)}$ For multiplication of fractions use parentheses

          This question requires you to fill in the blanks. Some steps will refer to previous answers you have typed,
so it is necessary to \"submit\" after filling in each blank. The quickest way to do this is hit enter after typing
instead of pushing the submit button.
Please see formatting instructions below the problem.
Use the double angle identity $cos(2x) = cos^2(x) - sin^2(x)$ to verify the double angle identity
$cos(2x) = 2 cos^2(x) - 1$
1.
The right side is more
complicated so start there:
Rewrite $sin^2(x)$ using the
Pythagorean identity:
2. Distribute the negative sign:
3.
Group like terms:
Now you have:
Proven!
$cos(2x) = cos^2(x) - sin^2(x)$
$= cos^2(x) - ($
$cos(2x) = $
$cos(2x) = $
$cos(2x) = $
$cos(2x) = $
$cos(2x) = $
FORMATTING INSTRUCTIONS BELOW
Type in lowercase and use parentheses. For example type sin(x) not sinx.
For fractions use the divide symbol \"\/\" .
For example sin(x)/cos(x) for $\frac{sin(x)}{cos(x)}$
For multiplication of fractions use parentheses

$This question requires you to fill in the blanks. Some steps will refer to previous answers you have typed, so it is necessary to s̈ubmitäfter filling in each blank. The quickest way to do this is hit enter after typing instead of pushing the submit button. Please see formatting instructions below the problem. Use the double angle identity cos(2x) = cos^2(x) - sin^2(x) to verify the double angle identity cos(2x) = 2 cos^2(x) - 1 1. The right side is more complicated so start there: Rewrite sin^2(x) using the Pythagorean identity: 2. Distribute the negative sign: 3. Group like terms: Now you have: Proven! cos(2x) = cos^2(x) - sin^2(x) = cos^2(x) - ( cos(2x) = cos(2x) = cos(2x) = cos(2x) = cos(2x) = FORMATTING INSTRUCTIONS BELOW Type in lowercase and use parentheses. For example type sin(x) not sinx. For fractions use the divide symbol .̈ For example sin(x)/cos(x) for (sin(x))/(cos(x)) For multiplication of fractions use parentheses$

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