Find a^-2 + ß^-2, if a and ß are the zeroes of the polynomial
2^x2 - x + 5.
Answers
Answer:
A flag is the most important symbol of a country. Similarly, the national flag of India is a symbol of paramount significance for India. The national flag of India is a symbol of honour, patriotism, and freedom for the country. It represents the unity of the people of India in spite of the differences in language, culture, religion, class, etc. Most noteworthy, the Indian flag is a horizontal rectangular tricolour. Furthermore, the flag of India consists of saffron, white, and green.
Answer:
The measure of central angle is 90 degrees.
Step-by-step explanation:
Given : Sector perimeter is 25 cm and radius of the circle is 7 cm.
To find : Measure of central angle of the sector?
Solution :
We know, The perimeter of sector is defined as
P=l+2rP=l+2r
where, l is the length arc and r is the radius.
P=25 cm , r=7 cm
25=l+2(7)25=l+2(7)
25=l+1425=l+14
l=25-14l=25−14
l=11l=11
So, The length of the arc is 11 cm.
Angle subtended by a circle is 360 degrees
Circumference of circle is given by,
\begin{gathered}C=2\pi r\\C=2\times \frac{22}{7}\times 7\\\\C=44cm\end{gathered}
C=2πr
C=2×
7
22
×7
C=44cm
Angle subtended by arc is given by,
\theta = 360\times \frac{l}{C}θ=360×
C
l
\theta = 360\times \frac{11}{44}θ=360×
44
11
\theta =\frac{360}{4}θ=
4
360
\theta =90^\circθ=90
∘
Therefore, The measure of central angle is 90 degrees.