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
DiKsa [7]
3 years ago
11

HELP <3 Match the expressions with their solutions.

Mathematics
1 answer:
densk [106]3 years ago
6 0

Answer:

1 ) sin 165°

2 ) cos 330°

3 ) Tan 157.5°

4 ) sin^2 157.5

Step-by-step explanation:

1 )

Given expression is  \sqrt{\frac{1-cos330}{2} }

We know that cos2x=1-2sinx^{2}

sinx^{2}=\frac{1-cos2x}{2}

(sinx/2)^2=\frac{1-cosx}{2}

So the first expression is sin (330/2)° =sin 165°

2 )

GIven expression is  1-2sin^2165

We know that cos2x=1-2sinx^{2}

So the result is cos 330°

3 )

Given expression is \frac{1-cos 315}{sin315}

We know that cos2x=1-2sinx^{2}

Also we know that sin2x = 2sinxcosx

So The numerator becomes 2sin^2x/2. and the denominator becomes as 2sinx/2cosx/2

\frac{2sin^2x/2}{2sinx/2cosx/2}=tanx/2

So the result is Tan 157.5°

4 )

Given expression is \frac{1-cos 315}{2}

We know that cos2x=1-2sinx^{2}

(sinx/2)^2=\frac{1-cosx}{2}

So the result is sin^2 157.5

You might be interested in
Please Answer!!!
gavmur [86]
This is the answer, attached below. :)

8 0
3 years ago
What is 34% of 60000000
Ainat [17]

(Lets hope i'm right :p)


The first thing you do is make "34%" into a fraction. That would be 1/34.

After, you would multiply.


1/4 x 60000000/1 = ?

(Use cross multiply if you know)

60000000 divided by 4 = 15000000

1/1 x 15000000/1 = 15000000/1 OR 15000000


Answer: 15000000/1 or 15000000

<em>Tell me if i'm wrong so I can prevent this in the future! Have a lovely day!</em>

                                                                                                     ~Pooch ♥


7 0
3 years ago
Read 2 more answers
What is the area of a rectangle if 1 base is 14 in, the 2nd base is 3.5 in and the height is 8 in?​
algol13

Check the picture below.

notice, we have three pair of sides, let's add them all up to get the area

\stackrel{\textit{left and right}}{2(8\cdot 14)}+\stackrel{\textit{front and back}}{2(3.5\cdot 8)}+\stackrel{\textit{top and bottom}}{2(3.5\cdot 14)}\implies 378~in^2

5 0
2 years ago
Plzlzzlzlzlzl help mememememe
sweet [91]

Answer:

1/2z=3/4

z=3/4 x 2

z=3/2

6 0
3 years ago
Need help ASAP!!!!!!!!
egoroff_w [7]

Answer:

24/35

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • What is the coefficient of -10n+10-10
    12·1 answer
  • PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! I CANNOT RETAKE THIS!!
    13·1 answer
  • An international company has 26,900 employees in one country. If this represents 16.9% of the company's employees, how many empl
    6·1 answer
  • A plank measures 4 and 3/4 feet. Elizabeth cuts off 2/5 of the plank. How long is the plank now?
    15·1 answer
  • Explain why u would make one of the ascends a tens number when solving an addition problem
    5·1 answer
  • 7x(x+1.8)=0 please help !
    6·2 answers
  • Question 6 (1 point)
    11·1 answer
  • Three hundred cars drove over a bridge in 23 minutes. At that rate, how
    7·2 answers
  • For what value of x is a parallelogram ABCD a rectangle
    7·2 answers
  • If f(x) = 4x^3 + Ax^2 + 7x - 1 and f(2) = 3, what is the value of A?<br> (^ = powers)
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!