Answer:
Option b
Step-by-step explanation:
Given is a picture with a circle and a diameter.
To find the angle y
We find that angle on the semi circle i.e. angle subtended by diameter at the corners of arc marked y is 90 degrees. This makes the angle solutions as shown in the picture.
In the quadrilateral two angles are 90, one is 53, and hence the other is
127. The adjacent angle to 127 is 53 and its complementary is 1/2 y = 37
Hence y = 74
OPtion b is correct
To write 0.0007716049 as a fraction you have to write 0.0007716049 as numerator and put 1 as the denominator. Now you multiply numerator and denominator by 10 as long as you get in numerator the whole number.
0.0007716049 = 0.0007716049/1 = 0.007716049/10 = 0.07716049/100 = 0.7716049/1000 = 7.716049/10000 = 77.16049/100000 = 771.6049/1000000 = 7716.049/10000000 = 77160.49/100000000 = 771604.9/1000000000 = 7716049/10000000000
so your answer is: 7716049/10000000000
Answer:
cos(18°)=sin(72°)
Step-by-step explanation:
we know that
In a right triangle
cos(A)=sin(B)
If A and B are complementary angles
so
A+B=90°
In this problem
A=18°
B=90-18=72°
therefore
cos(18°)=sin(72°)
Answer: x=2
Step-by-step explanation:
20+4(3x-5)+2x=28
We move all terms to the left:
20+4(3x-5)+2x-(28)=0
We add all the numbers together, and all the variables
2x+4(3x-5)-8=0
We multiply parentheses
2x+12x-20-8=0
We add all the numbers together, and all the variables
14x-28=0
We move all terms containing x to the left, all other terms to the right
14x=28
x=28/14
x=2