Answer:
90 between 1000 and 9999
Step-by-step explanation:
The first digit cannot be 0. It can be nine other digits.
The second digit can be anything between 0 and 9.
To be palindromic the 2nd and 3rd digits must be the same.
And in addition, the 1st and 4 numbers must be the same.
So the answer is 9 * 10 = 90. That does seem too small, but try making a palindrome with the restrictions I have outlined. None of the examples you have given beginning with 8 are palindromic.
8118 is palindromic
8998 is also palindromic
9009 is palindromic
2002 is palindromic
There are only 90 of them.
Answer:
a. 1
Step-by-step explanation:
You are dealing with a triangle and a rectangle, so just find the area of both of them then add it together.
To find the height of the triangle and the other side of the rectangle you have to use Trigonometry.
To find the height of the rectangle you must do:
8cos(30)= 6.928
Then solve for the length of the triangle by doing:
8Sin(30) = 4
Now just find the area of both shapes.
1/2(4* 6.928)+6.928*9=<span>76.2084064606</span>
Tanx sinx (cos^2x cscx- sinx)
=(sinx/cosx)((cos^2x cscx- sinx)
=(sinx/cosx)((cos^2x 1/sinx- sinx)
=(sinx/cosx)((cos^²x - sin²x)] / sinx
=(sinx/cosx)((cos^²x - sin²x)] / sinx
=(1/cosx)((cos^²x - sin²x)]
=(1/cosx)(2cos²x====> = 2 cos x]