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Orlov [11]
3 years ago
12

B) (1 - cos B)(1 + cos B) = 1/cosec^2(B)

Mathematics
1 answer:
faltersainse [42]3 years ago
4 0

Answer:

Proved

Step-by-step explanation:

(1-cosB)(1+cosB)=\frac{1}{cosec^2B} \\\\Use\\\\ (a+b)(a-b)=a^2-b^2 ,\\so,\\=(1)^2-(cosB)^2\\=1-cos^2B\\\\Now\ ,  we\ know\ \\sin^2B+cos^2B=1\\\\so,\\sin^2B=1-cos^2B\\so we just replace,\\\\=1-cos^2B=>sin^2B\\and\ since\ sinB=\frac{1}{cosecB} \\\\=sin^2B=>\frac{1}{cosec^2B}\\

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Rodent has two 7-foot-long pipes he needs to cut them into pieces that are 15 inches each what is the greatest number of 15 inch
Mice21 [21]
12 inch=1 ft
7 x 12=84 inches
84/15=5.6, so he can cut 5 , 15 inch piecs with .6 left over.
4 0
3 years ago
You focus your camera on a circular fountain. Your camera is at the vertex of the angel formed by tangents to the fountain. You
drek231 [11]

Answer:

The measure of the arc of the circular basin = 136°

Step-by-step explanation:

The measure of an angle formed when two line intercepts outside a circle is half the difference of the measure of the intercepted arcs.

Mathematically, the is represented as:

Measure of an angle = 1/2(big angle - Small angle)

This values are given in the question

Measure of an angle = Measure of angle formed by tangents to the fountain = 44°

big angle is represented by = 360°-x

small angle is represented by = x

Therefore, we have

44° = 1/2( 360° - x -x)

44° = 1/2(360° - 2x)

Cross multiply

44° × 2 = 360° - 2x

88° = 360° - 2x

88° - 360° = - 2x

-272° = -2x

x = -272/-2

x = 136°

The measure of the arc of the circular basin = 136°

6 0
3 years ago
Find the height <br> 9ft 4ft<br> h=
S_A_V [24]

Answer:

H = Square root of 77

7 0
3 years ago
Read 2 more answers
HELP! PLEASE! I CAN'T FIND THE ANSWER!
viktelen [127]
Call the integers 'N' and N+1.. Their sum is 2N+1. Twice their sum is 4N+2. . . Two more than that is 4N+4 and the question says that their product is equal to that. . So write N (N+1) = 4N +4, and then solve that equation to find N. I can tell you right now, by looking at it, that N is 4. You should solve the equation.
8 0
3 years ago
The population of a colony of beetles grows 30% each week. If the initial population is 65 beetles, how many beetles will be the
Crazy boy [7]
This is question of geometric sequence, equation of growth for this matter. The explicit formula for geometric sequence is given by:

a(n) = a(0)r^(n-1)

where;
a(n) = population after time "n"
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n = time = 5 weeks
r = common ratio = (100+30)% = 1.3

Substituting, beetles after 5 weeks will be;
a(5) = 65*1.3^(5-1) = 185.65 ≈ 186 beetles
7 0
4 years ago
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