Respuesta :
Answer:
sin(30°) = 1/2 and cos(60°) = 1/2
Step-by-step explanation:
* Lets explain how to solve the problem
- In the first quadrant all the trigonometry functions are positive values
- We need two angles have same positive values of sine and cosine
- That means sin(x) = cos(y) = + ve value
∴ The two angles will lie on the first quadrant
- If sin(x) = cos(y), then angles x and y are complementary angles
- The sum of the measures of the complementary angles is 90°
∴ x + y = 90°
- In any right angle triangle
- Angle Ф is one of its acute angles, where Ф is opposite to the side
of length a , adjacent to the side of length b and c is the length of the
hypotenuse
- Angle β is the other acute angle, where β is opposite to the side
of length b , adjacent to the side of length a and c is the length of the
hypotenuse
- The sum of Ф and β is 90° ⇒ complementary angles
∵ sin Ф = opposite/hypotenuse
∵ cos Ф = adjacent/hypotenuse
∴ sin Ф = a/c and cos Ф = b/c ⇒ (1)
∵ sin β = opposite/hypotenuse
∵ cos β = adjacent/hypotenuse
∴ sin β = b/c and cos β = a/c ⇒ (2)
- From (1) and (2)
∴ sin Ф = cos β and cos Ф = sin β
* Now lets chose any two complementary angles
- If Ф = 30°, then β = 60°
∴ sin(30°) = 1/2
∴ cos(60°) = 1/2
* sin(30°) = 1/2 and cos(60°) = 1/2
# Remember you can chose any two angles their sum is 90°
The trigonometric function and angle along with values to so they are equivalent such as sin 30° and cos 60° are 0.5.
What is trigonometry?
Trigonometry deals with the relationship between the sides and angles of a right-angle triangle.
The sine and cosine of two unique angles that do not fall on an axis where the values are the same positive value.
Let the two unique angles be x and y. Then we have
sin x and cos y are considered. And their value is same. Then we have
sin x = cos y
sin x = sin (90° - y)
x = 90° - y
x + y = 90°
x and y are unique then let the value of x is 30°. Then the value of y will be
30° + y = 90°
y = 60°
Then
sin 30° = 0.5
cos 30° = 0.5
More about the trigonometry link is given below.
https://brainly.com/question/22698523