Answer:
12
Step-by-step explanation:
see photo
Answer:
D √58
Step-by-step explanation:
Draw lines from Points A and B to Point C at (8, 4).
∆ABC is a right triangle.
AC = x₂ - x₁
= 8 - 1
= 7
BC = y₂ - y₁
= 4 - 1
= 3
AB² = AC² + BC²
= 7² + 3²
= 49 + 9
= 58 Take the square root of each side
AB = √58
A. 16.49
b. 5.09
c. 4.09
Let me know if you have questions!
Answer:
y = 7
Step-by-step explanation:
y = 0x + b
7 = 0(-2) + b
7 = b
y = 7
The value of cos 2x is 119/169 after applying the trigonometric identity cos2x = 1 - 2sin²x option second is correct.
<h3>What is trigonometry?</h3>
Trigonometry is a branch of mathematics that deals with the relationship between sides and angles of a right-angle triangle.
We have given:
sinx = -5/13
and cosx > 0
We know,
cos2x = 1 - 2sin²x
sinx = -5/13
Squaring on both sides:
sin²x = 25/169
Multiply by 2 on both the sides:
2sin²x = 2(25/169)
Add -1 on both sides:
-1 + 2sin²x = -1 + 2(25/169)
or
1 - 2sin²x = 1 - 2(25/169)
cos2x = 1 - 50/169
cos2x = 119/169 (as the cosx > 0)
Thus, the value of cos 2x is 119/169 after applying the trigonometric identity cos2x = 1 - 2sin²x option second is correct.
Learn more about trigonometry here:
brainly.com/question/26719838
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