The exact area of triangle ABC is 93.51 cm².
The given parameters;
- <em>Height of the triangle, h = 18 cm</em>
The base of the triangle is calculated by using trigonometry ratio as follows;
where;
- <em>b </em><em>is the </em><em>base </em><em>of the </em><em>triangle ABC</em>
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The area of the triangle ABC with the calculated base and given height is calculated as follows;
Thus, the exact area of triangle ABC is 93.51 cm².
Learn more about area of a triangle here: brainly.com/question/23945265
9 999 999 in words is read as nine million, nine hundred and ninety-nine thousand, and nine hundred and ninety-nine
By partitioning, we can write 9 999 999 as follow
9 000 000 + 900 000 + 90 000 + 9000 + 900 + 90 + 9
If we start at the first digit of '9' on the left, the next digit is ten times smaller than the previous one.
You have the following expression:
To verify the identity, you have that the left side of the equation becomes:
(1 + cosx)(1 - cosx) = (1 - cos^2 x)
because of the product of an expression by its conjugate result in a difference of squares. Or simplfy by expanding the factors and simplying.
Next, you have:
1 - cos^2 x = sin^2 x
because the Pythagorean identity.
Then, the identity is verified.
Let the larger number be w and the smaller number be k;
5w-11=3k
3k+16=4w
Reorganizing the equations;
5w-3k=11
4w-3k=16
Subtracting equation 2 from equation 1:
w=-5
Replacing value of w in equation 1;
5(-5)-11=3k
-25-11=3k
3k=-36
k=-12
The numbers are -5 and -12
