Find the two angles of a right triangle on the opposite side and the adjacent edge

Solution: Use the Pythagorean theorem and trigonometric functions.

The length of the two right-angled sides of a right-angled triangle is a, b, and the hypotenuse is c, so the Pythagorean theorem is <>

Get the third side;

In a right triangle, the corresponding trigonometric function is obtained by using the known conditions<> and the corresponding trigonometric function is obtained, and the number of angles is determined by viewing the trigonometric numerical table.

The length of the other side is found by the Pythagorean theorem, the square of a plus the square of b is equal to the square of c, and c is the hypotenuse of a right triangle. Then use the trigonometric function to find the value of the two angles, the method is as follows: divide the opposite edge by the hypotenuse to find the sine angle value, and divide the adjacent edge by the hypotenuse edge to find the cosine angle value.

This results in the value of the two corners.

With trigonometric functions, it's the easiest.

<> right triangles.

The opposite side of angle A is BC, and the adjacent sides are AB and AC

On the opposite side of angle B is the car bar AC, and on the adjacent side are BA and BC

The opposite side of angle C is AB, and the adjacent side is the sedan sail pointing CA and CB

Tip: In a triangle, the opposite edge is the edge that is not adjacent to the corner, and the adjacent edge is the edge that is adjacent to the corner.

In the right-angle round socks ABC, the hypotenuse Yongzhong Jinyuan is the hypotenuse, and the opposite side and adjacent edge refer to twoRight-angled edges(no hypotenuse or anything).

How to view the adjacent and opposite edges of a triangle:

1. Opposite side: the line on the opposite side of the corner.

2. Adjacent edges: the neighbors of this angle, the two lines that make up this angle.

3. Hypotenuse: The longest of the three lines of a right-angled triangle.

The opposite side of angle A is BC, the adjacent side is AB, and the hypotenuse is AC.

Determination of congruent triangles.

1. The three sides corresponding to the two triangles are equal, and the two triangles are congruent, referred to as "edge edge edge" or "sss"."。

2. The two sides of the two triangles and their angles are equal, and the two triangles are congruent, referred to as "corner edges" or "SAS".

3. The two corners corresponding to the two triangles and their intersections are equal, and the two triangles are congruent, referred to as "corners" or "ASA".

4. The two corners corresponding to the two triangles and the opposite side of one of the corners are equal, and the two triangles are congruent, referred to as "corner edges" or "AAS".

5. One hypotenuse and one right-angled side corresponding to two right-angled triangles are equal, and the two right-angled triangles are congruent, referred to as "hypotenuse, right-angled side" or "hl".

Do it with trigonometric functions, with tangents.

tan (degree of angle) = opposite edge adjacent edge.

If it is a special angle, it is better to do it, such as tan30 = root number 3 3 tan60 = root number 3

tan45=1

Use the trap wide nanotrigonometric function.

I do it with tangent.

tan (degree of the angle) = opposite edge adjacent edge.

It is better to do it if it is a special horn, such as tan30 = root number 3 3 tan60 = root number 3 tan 45 = 1

sin(3, 4) or 30 degrees.

It is one of the right-angled cluster with edges, and 4 is the oblique annihilation edge.

4 is two direct infiltration to change the edge of the reed.

tana = the end of the corner a is not open to the neighbor of the corner a to make the edge.

i.e.: tana=3 5

tana = tangent table: the angle withering age of angle a is: 30 degrees 58 seconds.