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
Alina [70]
2 years ago
9

Verify:cos(2A)=(cotA-tanA)/cscAsecA​

Mathematics
1 answer:
kolbaska11 [484]2 years ago
5 0

Answer:

see explanation

Step-by-step explanation:

Using the trigonometric identities

cot A = \frac{cosA}{sinA}, tanA = \frac{sinA}{cosA}, cscA  = \frac{1}{sinA}, secA = \frac{1}{cosA}

Consider the right side

\frac{cotA-tanA}{cscAsecA}

= \frac{\frac{cosA}{sinA}-\frac{sinA}{cosA}  }{\frac{1}{sinA}.\frac{1}{cosA}  }

= \frac{\frac{cos^2A-sin^2A}{sinAcosA} }{\frac{1}{sinAcosA} }

= \frac{cos^2A-sin^2A}{sinAcosA} × sinAcosA ( cancel sinAcosA )

= cos²A - sin²A

= cos2A

= left side ⇒ verified

You might be interested in
What's 7-(7-7):8x29=
topjm [15]

Answer:

the required ratio is 7 : 232

Step-by-step explanation:

by solving both sides we get ,

=》7 - ( 7-7 ) : 8 × 29

=》7 - 0 : 232

=》 7 : 232

it's the required ratio ,

i hope you got it .

5 0
3 years ago
Charlotte is on spring break in Mexico. She purchases a souvenir for 153 pesos, which she charges to her credit card. If the exc
KATRIN_1 [288]

1.) multiply the US dollars by the exchange rate $213 x 80.76 = 17,201.88

2. )divide pesos by the exchange rate 158/11.69 = $13.5158 so (a) is the correct answer


So the answer is

$13.52

6 0
3 years ago
Solve for X. <br> picture attached (15 points)
nikklg [1K]

Answer:

1) 75

2) 63

Ask if you want more

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Need help remembering how to solve f(x)=5x2
nata0808 [166]
F(x)=5*2
the f(x) stands for a normal X like any other algebraic equation. so all it is, is 5 times 2, which is 10.
so,
f(x)=5*2
f(x)=10<span />
3 0
2 years ago
Planes A and B are shown.
Gnom [1K]

Answer:

b

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Other questions:
  • Find the equation of the line that is parallel to the graph of 2x-7y=8 and passes through (-1,-1)
    13·1 answer
  • Find the circumference of a circle if the diameter is 24 feet.
    5·2 answers
  • 3/8 to 7/8 percent of change?
    10·1 answer
  • Heeeeeeeeeeelp download the doc
    10·2 answers
  • Find the value of two numbers if their sum is 23 and their difference is 5
    10·1 answer
  • The Exotic Store has 36 birds. One-third of them are parrots and one-fourth are cockatoos. A) How many parrots? B) How many cock
    11·2 answers
  • The probability of a chance event is 0.35, it is __________ to happen when compared to a chance event with a probability of 0.33
    8·2 answers
  • There is the option of buying two different rabbit colonies.
    6·1 answer
  • Solve for b.<br><br> problem: a=3(B+C)<br><br> 1) B=A-C/3<br> 2) B=3A-C/3<br> 3) B=A-3C/3
    12·1 answer
  • To find the height of a pole, a surveyor moves 150 feet away from the base of the pole and then, with a transit 4 feet tall, mea
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!