Answer:
<h2>
B. cot70 = 12/x</h2>
Step-by-step explanation:
The question lacks appropriate option Find the options below;
Answers to choose from are:
a) cot70 = x/12
b) cot 70= 12/x
c) sec 20= x/12
d) sec20 = 12/x
Given the triangle as shown in the attachment, to get the value of x, we will use one of the trigonometry ratio SOH, CAH, TOA
given ZY = x = opposite
XY = z = hypotenuse
XZ = 12 = adjacent
∠X = 20°
∠Z = 90°
Since sum of angle in the triangle is 180°, ∠X+∠Y+∠Z = 180°
20+∠Y + 90 = 180
∠Y = 180-110
∠Y = 70°
According to TOA,
tan∠X = opp/adj = ZY/XZ
tan70= x/12
since cot70 = 1/tan70
reciprocating both sides will give;
1/tan70 = 12/x
cot70 = 12/x
This gives the required expression
We could do it with algebra. But we can also do it the long way, which is
shorter than the algebraic way.
The digit in the tens place is 3 times the digit in the units place.
So the number MUST be
31, or
62, or
93 .
It can't be anything else.
Now here they are again, with the reverse of each one:
31 . . . 13 The new number is 18 less.
62 . . . 26 The new number is 36 less.
93 . . . 39 The new number is 54 less.
Obviously, the original number is 62.
Answer:
the answer is 15 because you have to do the problem in the parentheses first then multiply by 5
Answer:
Step-by-step explanation:
if the diagonal of a square is 11.3 what is the perimeter
from the diagonal we find the area, which can also be found by multiplying diagonal by diagonal divided by two, then we make the square root of the area and find the side, we multiply by four and we have the perimeter
(11.3 * 11.3) : 2 = 63.8 u² (Area)
√63.8 = 7.9 (side)
7.9 * 4 = 31.6u (perimeter)