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
sattari [20]
3 years ago
11

Use angle addition formula to find the expression for cos(a+b). Use the same formula to

Mathematics
2 answers:
melisa1 [442]3 years ago
7 0
What they said!!!!!!!!!!!!
Sav [38]3 years ago
5 0

Answer:

we have

Cos (a+b)=Cos aCosb-SinaSinb

for

Cos (a+a)=Cos aCosa-SinaSina=<u>Cos²a-Sin²a</u>

is a required answer.

You might be interested in
PLS HELP!! i will fail if i don’t get this right:(
andre [41]
Find the reciprocal of the second fraction: -9/4, and multiply it instead of dividing.
2/3 x -9/4 = -18/12. By reducing it’ll be -3/2, or -1 1/2 in mixed form.
3 0
2 years ago
Write -9.54 as a fraction in simplest form
sammy [17]

Answer:

-9 \frac{27}{50}

Step-by-step explanation:

6 0
3 years ago
2. Find 28% of 158.
kenny6666 [7]

Answer:

The answer to 28% of 158 is 44.24

4 0
3 years ago
Read 2 more answers
The cat is 12 feet above the ground and the ladder is 9 feet away from the tree because of the mud. How long does the ladder nee
marin [14]

Answer:

15 feet

Step-by-step explanation:

The ladder is the hypotenuse of a right triangle, with the legs being 9 ft and 12 ft long (see the picture).

To solve for the length of the ladder, use the Pythagorean Theorem.

9^{2} +12^{2} =c^{2} \\c=\sqrt{9^{2} +12^{2}} \\c=\sqrt{81+144} \\c=\sqrt{225} \\c=15

4 0
3 years ago
Filbert makes $14 per hour. If he makes time and a half for overtime, how much will he make for working 63 hours?
Marina CMI [18]

Answer:

$1323.00

Step-by-step explanation:

A simple equation that can be used to figure this out is:

p*1.5*o=t

The variables mean:

p- hourly pay

o- hours worked overtime

t- total amount of money earned.

(Also, the 1.5 is always used to calculate overtime, no matter what job, unless otherwise specified, and as referred in the problem as "time and a half").

So, to finally work out this problem:

($14*1.5)*63=?

first, (14*1.5)= $21

($21*63)= $1323.

4 0
3 years ago
Other questions:
  • Prove that every rational number and every root of a positive rational number are algebraic numbers.
    6·1 answer
  • Compare the linear functions expressed below by data in a table and by an equation.
    7·2 answers
  • Can someone please help me with this math problem?
    15·1 answer
  • Zoe is working two summer jobs, making $7 per hour babysitting and making $15 per
    5·2 answers
  • Two equations are given below:a − 3b = 9a = b − 3what is the solution to the set of equations in the form (a,
    8·1 answer
  • What’s one way to check 102÷6 = 17
    9·2 answers
  • Graph the function g(x) =x^2+4x+1
    6·1 answer
  • FInd the volume of the figure
    11·2 answers
  • 1. The people of Whoville were shopping like crazy to get their lists completed! One customer bought a wreath for $12 and seven
    11·2 answers
  • Answer please ill give brainlist and ten points
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!