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
navik [9.2K]
2 years ago
11

Exercise questions

Mathematics
1 answer:
balu736 [363]2 years ago
3 0

Answer:

2.

a)1

b)1

c)1

Step-by-step explanation:

There's some identity trigonometric equation, which are valid for all angles,and they doesn't depends on the measure of angle!

some of em are follows:. (x is the given angle)

  • sin(x)^2+cos(x)^2=1
  • cosec(x)^2=1+cot(x)^2
  • sec(x)^2=1+tan(x)^2

You can remember these identity, its gonna help alot.

now back to question,. {x is representing angles)

for (a) sin(x)^2+cos(x)^2=1, this is true for all x, dat means that for all the angle given in question(for ,15°,30°,45°,60° and 120°),we will get 1

for(b) ,

cosec(x)^2=1+cot(x)^2

i.e, cosec(x)^2-cot(x)^2=1, again this is true for all x dat means that for all the angle given in question ,we will get 1

for (c),

sec(x)^2=1+tan(x)^2

i.e,sec(x)^2-tan(x)^2=1,again this is true for all x, dat means that for all the angle given in question ,we will get 1

✌️:)

You might be interested in
1/2y+2/5=4 2/5 how do I solve this matter
Inessa [10]

Answer:

y =8

Step-by-step explanation:

1/2y+2/5=4 2/5

Subtract 2/5 from each side

1/2y+2/5-2/5=4 2/5-2/5

1/2 y = 4

Multiply each side by 2

1/2y *2 = 4*2

y = 8

3 0
3 years ago
M is the midpoint of DE. If MD = 4x - 6 and ME = 3x + 2, find the length of DE.
bekas [8.4K]
The length of the de uwb
5 0
2 years ago
Base 8 representation of 112 work out
erastovalidia [21]
To convert a decimal (112) to base 8, divide by eight, keep the quotient and remainder.  Repeat with the quotient.

112/8=14 R0
14/8=1 R6
1/8=0 R1

Read the remainders from bottom to top to get 160 (base 8) = 112 (decimal)
6 0
3 years ago
Quotient of 1+i/3+4i?
NISA [10]

Answer:

\dfrac{7}{25} - \dfrac{1}{25}i

Step-by-step explanation:

I assume you are asking

\dfrac{1 + i}{3 + 4i}

although what you wrote means this

1 + \dfrac{i}{3} + 4i

Back to what I think is your problem:

\dfrac{1 + i}{3 + 4i} =

= \dfrac{1 + i}{3 + 4i} \times \dfrac{3 - 4i}{3 - 4i}

= \dfrac{(1 + i)(3 - 4i)}{(3 + 4i)(3 - 4i)}

= \dfrac{3 - 4i + 3i - 4i^2}{9 - 16i^2}

= \dfrac{3 - i + 4}{9 + 16}

= \dfrac{7 - i}{25}

= \dfrac{7}{25} - \dfrac{1}{25}i

8 0
2 years ago
Please help to write the following
Vanyuwa [196]

Answer: option 2. x²-1

Step-by-step explanation:

concept to know: a²-b²=(a+b)(a-b)

------------

(a+b)(a-b)=a²+b²

(x+1)(x-1)=x²-1

Hope this helps!! :)

Please let me know if you have any question

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the correct answer to this mathematical problem?
    11·1 answer
  • Determine whether the question
    12·1 answer
  • Write an equation for n times a only using addition
    11·1 answer
  • jackson owes his sister Monica $15. Monica has a $10 in her pocket. Explain the meaning of zero in this situation.
    6·1 answer
  • Which are possible lengths of the sides for a triangle?
    13·1 answer
  • If a=5 what is the value of the card 4a-2
    5·2 answers
  • Please help I'm tired asking 11 times
    9·1 answer
  • Can someone please help me? I will mark brainliest. Random answers will be reported
    15·1 answer
  • Gcf of 24 and 42 and you dont have t explain but i need the answer thats all
    9·2 answers
  • Harry is one third as old as his father. If his father is x 12 years old, how old is Harry? StartFraction x over 3 EndFraction 4
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!