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
Alexus [3.1K]
3 years ago
6

Cos^2x+1=0 help me pls

Mathematics
1 answer:
andrezito [222]3 years ago
8 0
There is no solution
You might be interested in
Chris has 2 pairs of black socks, 4 pairs of red socks, and 18 pairs of white socks in a dresser drawer. What is the probability
defon

Answer:

75%

Step-by-step explanat

5 0
3 years ago
Read 2 more answers
Justify your answer
BaLLatris [955]

Answer:

8cm

Step-by-step explanation:

x is similar to the side 12cm.

We know the second triangle is rotated counter-clockwise from the first because similar triangles have the same angle measurements.

Since the angle in the first triangle between 9cm and 15cm is 53°, it can't be similar to the angle between x and the hypotenuse in the second triangle.

Find the scale factor:

Triangle 1/Triangle 2

Divide two similar sides.

6/9 = 2/3

Multiply the scale factor by the similar side to find x.

x = 12*(2/3)

x = 8

7 0
3 years ago
What the answer?????????????????
Andrews [41]

Answer:

its c

Step-by-step explanation:

3 0
3 years ago
9. Determine whether or not the number 257 is prime.
Sladkaya [172]

Answer:

257 is prime.

Step-by-step explanation:

To evaluate if a number is prime, we just need to evaluate it for the prime numbers that are equal or lesser than the said number's square root.

In this case, √257 = 16.03 so we just need to see if 257 is divisible by <u>2, 3, 5, 7, 11 and 13</u> (the prime numbers that come before 16)

  • 257 is odd, so it is not divisible by 2.
  • The sum of its digits is 14, therefore, it is not divisible by 3.
  • 257 ends in 7, therefore it's not divisible by 5.
  • 257/ 7 = 36.71 so it's not divisible by 7.
  • 257/ 11 = 23.36 so it's not divisible by 11
  • Finally 257 / 13= 19.76 so it's not divisible by 13.

Therefore, 257 is prime.

7 0
3 years ago
Factor and solve the equation
murzikaleks [220]
y=4x^2-64=4(x^2-16)=4(x^2-4^2)=4(x-4)(x+4)\\\\-------------------------------\\\\4(x-4)(x+4)=0\iff x-4=0\ or\ x+4=0\\\\x=4\ or\ x=-4
8 0
3 years ago
Other questions:
  • Which of the following represents five hundred four thousand, forty-seven written in expanded form?
    5·1 answer
  • How can I use operations to model real world problems?
    7·1 answer
  • Seven Grade Math<br> Explain why
    6·1 answer
  • Farmers Han and Vreel both bought querts and Kents for their farms. Han bought 1 quert and 9 kents for $51. Vreel bought 8 quert
    12·1 answer
  • Write an equation in slope-intercept form for the following line:<br> (-14.1) and (13,-2)
    7·1 answer
  • Which choices are correct when determining the distance between −56 and −31?
    6·1 answer
  • PLEASE HELP!!!!!!!!!!!!!!
    9·1 answer
  • Help plz only one question and the ans will come 100 ,100 ,80 of each angle​
    14·1 answer
  • Congruent Triangles ?
    15·1 answer
  • Is the given point interior, exterior, or on the circle (x 2)2 (y - 3)2 = 81? p(8, 4) click on the graphic to choose the correct
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!