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
Serggg [28]
3 years ago
10

Use double angle formulas to find the exact value of sin2x,cos2x, and tan2x

Mathematics
1 answer:
denis-greek [22]3 years ago
5 0
Sin2x = 2sinxcosx;
cos2x = (cosx)^2 - (sinx)^2;
tan2x = (sin2x)/(cos2x);

 cosx = 5/13 from formula (sinx)^2 + (cosx)^2 = 1;

=> sin2x = 120/169; 
.................................

You might be interested in
Which symbol correctly compares the two fractions?
dedylja [7]

Answer:

5/12<3/6

Step-by-step explanation:

3/6 is 1/2 and 5/12 is smaller than 1/2

4 0
3 years ago
Read 2 more answers
9+4x-5+12x-3x I am sooooo bad at math can I get some help please?!☹
Ghella [55]
13x+4
Combine like terms
If there is a minus sign count it as a negative
5 0
3 years ago
Read 2 more answers
Four years after opening an account that paid simple interest of 4.25% annually, a depositor withdrew the $2,380 in interest ear
satela [25.4K]

Answer:

Step-by-step explanation:

In order to figure out how much money was left in the account after the interest was withdrawn, we have to first find out how much money was initially deposited to earn that amount of interest! The means to find that initial investment is found in the simple interest formula

prt = I, where

p is the initial investement,

r is the interest rate in decimal form,

t is the time in years, and

I is the interest earned. Notice that we have all those things but the p.

Filling in:

p(.0425)(4) = 2380 and

.17p = 2380 so

p = 14000

That means that 14000 was initially invested. If the depositor withdrew the 2380, then

14000 - 2380 is the amount left in the account, namely, $11620

7 0
3 years ago
What is the diameter of a 30 inch circle?
Svetach [21]
C = (pi) * d
C / (pi) = d

30 / 3.14 = d
9.55 = d
8 0
4 years ago
HELP PLEASEE i need it
Soloha48 [4]

Answer:

See explanation

Step-by-step explanation:

<u><em>1st photo:</em></u>

x = \sqrt{15}

\frac{x}{5} = \frac{3}{x}

x^{2} = 15

x = \sqrt{15}

<u><em>2nd photo:</em></u>

(a) GEH ~ FGH ~ FEG

<em>similar triangles, use similar corners in the right order</em>

(b) \frac{FE}{GE} = \frac{GE}{EH}   AND    \frac{FH}{GH} = \frac{GH}{HE}

<em>similar triangles, use similar sides in proportion</em>

<em />

<u><em>3rd photo:</em></u>

x = 4.5 or 4 1/2

\frac{x}{3} = \frac{3}{2}

<em>2x = 9</em>

<em>x = 4.5 or 4 1/2</em>

<em />

<u><em>4th photo:</em></u>

Length of string = 118.2 ft

<em>sin(40) = 76/x</em>

<em>x = 76/sin(40) = 118.2</em>

7 0
3 years ago
Other questions:
  • How do you graph y=3/2x-1
    10·2 answers
  • I need help please?!!!!!!!!
    15·1 answer
  • "the quotient of 10 plus x and y minus 3"?
    5·1 answer
  • Fiona wrote the predicted and residual values for a data set using the line of best fit y=3.71x-8.85. Which statements are true
    9·2 answers
  • Gave needs 60 liters of 40% acid solution he currently has 20% solution and 50% solution how many liters of each does he need to
    9·1 answer
  • Eight more than a product of a number and three
    9·2 answers
  • This is relative frequency table. Can someone help me?
    12·1 answer
  • If g(x)= x^2 -x, find g(-1)+4
    6·1 answer
  • Circumference (Level 2)
    8·1 answer
  • HELP WILL MARK BRAINLIEST
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!