3 years ago

Simplify the expression by using a double angle formula cos^2 4theta-sin^2 4theta

1 answer:

6 0

Double angle formula for cos(2x) is
cos(2x)=cos^2(x)-sin^2(x)

Substitute x=4theta, then
cos(8theta)=cos^2(4theta)-sin^2(4theta)
=>
cos^2(4theta)-sin^2(4theta) = cos(8theta)

You might be interested in

Last year Golden State Warriors won 80% of the first 15 matches. Then they won the rest of the three matches. What percent of al

igomit [66]

Answer:

they won 85.7%

let me know if you need any more help with this question :)

6 0

3 years ago

Read 2 more answers

Write 2 1/16 as a decimal

devlian [24]

Answer:

2.0625

Step-by-step explanation:

2+1/16

= 2.0625

= 206.25%

6 0

3 years ago

Read 2 more answers

Please help me, I'm being timed

ki77a [65]

Answer:

1.5x=6

x=4

Step-by-step explanation:

The area is length times width so 1.5 times x is the correct equation. Make x equal to one by dividing both sides by 1.5. x=6/1.5. Simplify this to get x=4.

Please mark as brainliest

4 0

3 years ago

Nth Term help please

liberstina [14]

$\bf \begin{array}{|ll|ll} \cline{1-2} term&value\\ \cline{1-2} a_1&3\\[0.8em] a_2&\stackrel{3\cdot 2}{6}\\[0.8em] a_3&\stackrel{6\cdot 2}{12}\\[0.8em] a_4&\stackrel{12\cdot 2}{24}\\[0.8em] a_5&\stackrel{24\cdot 2}{48}\\[0.8em] a_6&\stackrel{48\cdot 2}{96} \\ \cline{1-2} \end{array}$

8 0

3 years ago

Evaluate the formula v=bh/3 for b = 36 in.2 and h = 11 in.

Over [174]

V=36times 11/3
v=132

4 0

4 years ago

Read 2 more answers