Answer: c) tan x = 43/18
Step-by-step explanation:
Tan = Toa = Opposite/Adjacent
Given:
The equation is
To find:
The solution of the given equation.
Solution:
We have,
Subtracting both sides by 20, we get
Multiply both sides by 3.
Therefore, the solution of the given equation is .
The sum of the digits is 81
sum the digits again and get 9
Therefore, as 9 is only divisible by 9 and 3 the answer is 'C'
Answer:
f(2) = 15
for f(x) = 4, x = 6
Step-by-step explanation:
f(2) means f(x) for x = 2.
in the table for x = 2 we see f(x) = 15.
the second question : f(x) = 4
so, where in the table do we find f(x) = 4 ? ah, for x = 6 do we find f(x) = 4.
Repeated
the lowest first digit can be 2
hmm, 5 numbers
the smallest number is 211
1 cannot be used for the first number, leaving 4 choices for the first number
the last 2 numbers can be any of the 5 numbers so 5 choices each for each of those slots
so
4*5*5=100
there are 100 numbers
B is answer