Answer:
6.9
Explanation:
Assuming that this is a right triangle trigonometry problem, we first need to determine what ratio must be used to find a.
B = 74°
c = 25
Sine equals Opposite over Hypotenuse.
Cosine equals Adjacent over Hypotenuse.
Tangent equals Opposite over Adjacent.
I'm guessing that c is the hypotenuse and that a is adjacent of B. With this, I know that we need to use cosine.
Cos∅ = (Adjacent ÷ Hypotenuse)
Cos∅ x Hypotenuse = Adjacent
Cos(74°) x 25 = a
(0.2756) x 25 = a
a = 6.89
Finally, round to the nearest tenth.
6.89 -> 6.9
~Hope this Helps!~