1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jeka57 [31]
2 years ago
9

Trigonometric identities Simplify cos^2 theta -1/ 4 sin^2 theta

Mathematics
1 answer:
Veronika [31]2 years ago
4 0

Answer:

B

Step-by-step explanation:

using the identity

sin²x + cos²x = 1 ( subtract 1 from both sides )

sin²x + cos²x - 1 = 0 ( subtract sin²x from both sides )

cos²x - 1 = - sin²x

then

\frac{cos^20-1}{4sin^20}

= \frac{-sin^20}{4sin^20} ← cancel sin²Θ on numerator and denominator

= \frac{-1}{4}

= - \frac{1}{4}

You might be interested in
Miss James has a six square-foot bulletin board in at 12 ft.² bulletin board she wants to cover both boards with index cards wit
irinina [24]
6 divided by 1/4 = 24 + 12 divided by 1/4 = 48, then 48 + 24 = 72
5 0
3 years ago
Please help quick I will give brainliest :(
Flura [38]

Answer:

r=4 d=8 a = 16π c = 8π

d=6 r=3 a=9π c=6π

a=36π r=6 d=12 c=12π

c=18π r=9 d=18 a=81π

Step-by-step explanation:

hope this helps (:

6 0
3 years ago
PLS HELP ITS MATH AND I DONT UNDERSTAND <br> No links pls and ty &lt;3
tankabanditka [31]
<h3>Answer:</h3>

C=52.08π

<h3>Solution:</h3>
  • Circumference of a circle:
  • C=2πr
  • where
  • π=3.14...
  • r= radius
  • In this case, r is equivalent to 26.04 ft.
  • C=2π×26.04
  • Multiply:
  • C=52.08π (in terms of pi)

Hope it helps.

Do comment if you have any query.

8 0
2 years ago
Read 2 more answers
Find the surface area of a cylinder with a diameter of 18 and a height of 32. Use 3.14 for π. Round your answer to the nearest t
Ksenya-84 [330]

Answer: a = 2,315.5

Step-by-step explanation:

a = 2πrh+2πr²

a = 2π(9)(32) + 2π9²

a = 2π x 288 + 2π x 81

a = 1809.6 + 508.9

a = 2,315.5

(pls mark me the brainliest)

(theres a button that says "mark brainliest" on my answer)

7 0
3 years ago
12) Why doesn't SSA prove two triangles are congruent? *
Svet_ta [14]
Ans: Four shortcuts allow students to know two triangles must be congruent: SSS, SAS, ASA, and AAS. Knowing only side-side-angle (SSA) does not work because the unknown side could be located in two different places. The same is true for side angle side, angle side angle and angle angle side.
7 0
3 years ago
Other questions:
  • What does the phrase"between 7.2 and 7.6, inclusive" mean?
    12·1 answer
  • SOMEBODY PLEASEEE HELP ME
    13·1 answer
  • Can you guys please help me in question 12 A B C
    7·1 answer
  • Susan is writing a linear equation for the cost of her cell phone plan. In the first month, she talks for 52 minutes and is char
    9·1 answer
  • Please help Cassie uses 1 quart cranberry juice., 1/2 gallon ginger ale, and 1 1/2 pints orange juice to make fruit punch. How m
    10·1 answer
  • The closing price (in dollars) per share of stock of tempco electronics on the tth day it was traded is approximated by p(t) = 2
    10·1 answer
  • The geometric mean of 3 and 6.
    15·1 answer
  • Jacob sells homemade skateboard decks for a profit of $27 per deck. He is considering switching to a new type of material that w
    15·2 answers
  • A restaurant chef bought potatoes at four different stores. The table shows the amount of the potatoes she bought at each store
    8·1 answer
  • A pair of dice was rolled many times
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!