Answer:
Option (3)
Step-by-step explanation:
By applying cosine rule in the triangle ABC,
BC² = AC² + AB² - 2(AC)(AB)cosA
5² = 3² + 7²- 2(3)(7)cosA
25 = 9 + 49 - 42cos(A)
25 = 58 - 42cos(A)
cos(A) =
A =
A = 38.21°
A ≈ 38°
Option (3) will be the correct option.
3/8 would be the answer pls mark brainliest
1. 0.8
2. 3.87298
3. ?
4. ?
5. ?
6. 5
7. True
8. ?
9.
Step-by-step explanation:
Convert the exponential equation to a logarithmic equation using the logarithm base
(
e
)
of the right side
(
0.0025
)
equals the exponent
(
−
6
)
.
log
e
(
0.0025
)
=
−
6