AB, CA, BC hope this helps
Answer:
90
Step-by-step explanation:
As the number you are rounding is followed by 9, you have to round the number up.When the number you are rounding up if followed by 5,6,7,8 or 9 you will have to round the number up. Example: 38 rounded to the nearest ten is 40.
If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down. Example: 33 rounded to the nearest ten is 30.
Answer:
x = -2 or x = -6 or x = sqrt(5) or x = -sqrt(5)
Step-by-step explanation:
Solve for x:
x^4 + 8 x^3 + 7 x^2 - 40 x - 60 = 0
The left hand side factors into a product with three terms:
(x + 2) (x + 6) (x^2 - 5) = 0
Split into three equations:
x + 2 = 0 or x + 6 = 0 or x^2 - 5 = 0
Subtract 2 from both sides:
x = -2 or x + 6 = 0 or x^2 - 5 = 0
Subtract 6 from both sides:
x = -2 or x = -6 or x^2 - 5 = 0
Add 5 to both sides:
x = -2 or x = -6 or x^2 = 5
Take the square root of both sides:
Answer: x = -2 or x = -6 or x = sqrt(5) or x = -sqrt(5)
The trigonometric ratios have been determined and the angles T and U are complementary.
<h3>What are Trigonometric Ratios?</h3>
Trigonometric Ratios are ratios of the side of a right-angled triangle. These are used to find the missing sides and angles of a right-angled triangle.
A right-angled triangle is a triangle with a measure of one of the angles as 90 degrees.
The triangle TUV is a right-angled triangle, the sides of the triangle are t, u, and v.
Part 1:
The angle T is not equal to angle U.
But by the angle sum property,
T + U + V = 180
T + U = 90
Both the angles are complementary.
Part 2:
The trigonometric ratios are as follows:
sin T = t/v
cos T = u/v
sin U = u/v
cos U = t/v
Part 3:
From the data in part 2,
Options C and D are the correct statements.
sin T = cos U
cos T = sin U
Part 4:
sin 37 = cos ( 90-37)
sin 37 = cos 53
To know more about Trigonometric Ratios
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