Question

Please help!

Answer 1

Answer:

adjacent side and Hypotenuse

Step-by-step explanation:

In a right angle triangle the sides are known as

• Perpendicular=Opposite side
• Base=Adjacent side
• Hypotenuse

So

• cosØ=Base/Hypotenuse
• cosØ=Adjacent/Hypotenuse

Hence option D is correct

Answer 2

Answer:

D.  adjacent side; hypotenuse

Step-by-step explanation:

Trigonometric ratios

$\sf \sin(\theta)=\dfrac{O}{H}\quad\cos(\theta)=\dfrac{A}{H}\quad\tan(\theta)=\dfrac{O}{A}$

where:

• $\theta$ is the angle
• O is the side opposite the angle
• A is the side adjacent the angle
• H is the hypotenuse (the side opposite the right angle)

Therefore, when the cosine trigonometric ratio is used to find a given angle, we take the inverse cosine of the ratio of the adjacent side to the hypotenuse:

$\implies \sf \theta = \cos^{-1}\left(\dfrac{A}{H}\right)$