Answer:
The cosine of an angle is the ratio of the length of the leg adjacent to the angle to the length of the hypotenuse.
Step-by-step explanation:
- In a right angled triangle, the cosine of an angle is the length of the adjacent side divided by the length of the hypotenuse.
- Also it is the sine of the complementary angle.
- The abbreviation is cos
- The longest side of the triangle is called the hypotenuse,
- The side opposite the angle theta is called the opposite side,
- The third side is called the adjacent side.
- Therefore,

Answer:
a) eight and seven ninths minus three and four sixths
Step-by-step explanation:
The required result is 
a)

b)

c)

d)

Answer:
79
Step-by-step explanation:
Let the original number be x.
x/2 = 39.5
x = 39.5 × 2
x = 79
Answer:
below( hope this helps )
Step-by-step explanation:
2. No because we don't know if the triangles are right triangles.
3. unknown since there are no labels to what the triangle points are