Cos(Ф) - 2sin(Ф).cos(Ф) =0
Factorize--> cos(Ф)[ 1-2sin(Ф)] =0
a) cos(Ф) = 0 ==> Ф= 0 or (0+2kπ)
b) 1-2sin(Ф) =0 ==> -2sin(Ф) = - 1 ==> sin(Ф) =1/2 Or
sin(Ф) = 1/2 ==> Ф =π/3 OR π/3 + (k+1)π/3
1) 43
2) 21
step by step:
Both triangles are right triangle which means they're equal to 90.
1) 23+24+X= 90
47+x= 90
x= 90-47
X= 43
2) 30+39+X= 90
69+X= 90
X= 90-69
X= 21
The answer to eight hundred and five thousandths is 8.5
Answer:
29.5 units^2
Step-by-step explanation:
Equation for area of a circle is πr^2 radius 5
The area of the circle is 25π sq units
The area of the square is 49 square units because all sides are 7 units long.
The shaded region is 25π - 49
78.5 - 49 = 29.5 units^2
Answer: 35
Step-by-step explanation:
You would set up the equation
25/x=20/28 cross multiply 25•28 and then divide by 20