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
Sophie [7]
2 years ago
15

Which of the following are trigonometric identities ? Check all that apply. Tan^2 x -

Mathematics
1 answer:
snow_tiger [21]2 years ago
3 0
I hope you are looking for these answer choices as you have not posted the choices. Therefore, I have a similar question with these answer choices.

a). tan² x - 1 = sec²x
b). 4 cosxsinx = 2cos + 1 -2sinx
c). tanx cosx cscx = 1
d). 1- tanx tany = cos(x+y) ÷ cosx cosy

<span>Options B, C, D are correct because, for all them, left-hand side equals to the right-hand side for x = 0.

The option A)
</span>tan² x - 1 = sec²x<span> is not true. 
since x = 0
Therefore,
The Right hand side would be:
                                         </span>tan² x - 1 = sec²(0)<span>
                                                             = 1
The Left hand side would be:
                                         </span>           tan² x - 1 = tan² (0) - 1
                                                                   = 0 - 1
                                                                   = -2
Therefore,
Both sides are not equal so it's not a trigonometric identity.
You might be interested in
Each interior angle of a regular polygon is 140°.Find the number of sides​
castortr0y [4]

Step-by-step explanation:

Each interior angle=140°

(n-2)180°/n=140°

180°n-360°/n=140°

180°n-360°=140°n

180°-140°=360°

40°n=360°

n=360°/40°

n=9

Hence, the number of sides of the polygon is 9.

It is nonagon .

8 0
3 years ago
Please help me!!!!!!!!!!
Kipish [7]

Answer:

80 is the kilometers question

8 0
2 years ago
Pat is making 5 stools with circular seats that are each 12 inches in diameter. She wants to paint the tops of all the stools br
vivado [14]
Start by finding the area of one of the stools with this formula:
A=(3.14)(12)(12)
Then multiply that answer by five, since there are 5 stools.
Hope this helps :) good luck
6 0
2 years ago
0 A maker of a certain brand of low-fat cereal bars claims that the average saturated fat content is 0.5 gram. In a random sampl
balandron [24]

Answer:

<em>The first step is to determine the average </em>

x= \frac{0,6+0,7+ 0,7+0,3+0,4+ 0,5+ 0,4 +0,2}{8}\\\ x= 0,475

<em>The exercise says it’s a normal distribution: (n=8)</em>

s^{2}= \frac{1}{n-1} ((0,6.x)^2+2(0,7-x)^2+(0.3-x)^2+2(0.4-x)^2+(0.5-x)^2+(0.2-x)^2)\\\ \frac{1}{7}*0,235 = 0,0336 \\\\ s= 0183

<em>According to the exercise, the mean is equal to 0,5 then the value of t of the distribution can be obtained </em>

<em />

t= \frac{x-u}{\frac{s}{\sqrt{n} }}\\\ t= \frac{0,475 - 0,5}{0,183}\\\  t= -0,3860

<em>The variable t has 7 grade to liberty, we calculate the p-value as: </em>

2* P(t < - 0,3860)= \\\ 2* 0,3554 = 0,7108

This value is very high, therefore the hypothesis is not rejected

7 0
3 years ago
Hi I need HELP with this question​
myrzilka [38]

Answer:

B

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • Write each improper fraction as a mixed number. 9/4. 8/3. 23/6. 11/2. 17/5. 15/8. 33/10. 29/12.
    10·2 answers
  • Huan deposited $900 into a college savings account earning 4.6% interest compounded annually. He also deposited $900 into a seco
    8·1 answer
  • Distributive property
    6·2 answers
  • Two integers a and b, have a product of 24. What's the least they can be?
    13·1 answer
  • I need help because this is hard
    10·1 answer
  • The table below shows an inequality and a number by which to divide both sides.
    9·2 answers
  • Convert 1101, to base 10. ​
    13·1 answer
  • Mika rides his bike 3 miles each way to his friend's house. He leaves his house at 4 p.m. How many miles does he ride his bike t
    13·1 answer
  • -2x+20y=-18 <br> 8x+10y=-18
    9·1 answer
  • Given: 3c + d = f + g, d = f, g = c + 8 Prove: c = 4
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!