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Pachacha [2.7K]
3 years ago
10

PLEASE ANSWER FAST answer the ones that are circled only plzzz

Mathematics
1 answer:
Sergio039 [100]3 years ago
8 0
Aaaaaaaaaaaaaaaaaaaaaa

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For sin2x+cosx=0, use a double-angle or half-angle formula to simplify the equation and then find all solutions of the equation
Archy [21]

Answer:

Step-by-step explanation:

Given is a trignometric equation in x, as

sin2x+cosx=0

TO make it in one trig ratio, we can replace sin2x as 2sinx cosx

WE get now

2sinxcosx+cosx=0\\

cosx(2sinx+1)=0\\cosx=0, sinx =-0.5\\

Principal solution is x=\frac{\pi}{2} , \frac{-\pi}{6}

x = ±π/2 + 2kπ, where k is any integer or

x=±pi/6 +k pi, where k is any integer.

General solution is

4 0
3 years ago
Nicholas has $50 to use while he is on a vacation. He decides to spend $5
Likurg_2 [28]

Answer:

days(d) = 50 ÷ 5

Explanation:

50 ÷ 5 =  number of days

4 0
3 years ago
Rue or False: Temperatures above-zero represent negative numbers. *
skelet666 [1.2K]

Answer:

False

Step-by-step explanation:

tempuratures below zero are negative.

3 0
3 years ago
Read 2 more answers
Find d:
BlackZzzverrR [31]

Answer:

D = 51, other = 30

Step-by-step explanation:

d = | 5  1 |

     |-1  10|

D = (5 x 10) - ( 1 x -1) = 50 + 1 = 51

| 2   4|

|-3   9|

(2 x 9) - (4 x -3) = 18 + 12 = 30

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3 years ago
What is the circumference of a circle if it’s 31.67
Vika [28.1K]

Answer:

Step-by-step explanation:

2πr

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3 years ago
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