2) Which is equal to sin θ?

Answer is:

Opposite Side/Hypotenuse

Explanation:

Sine Function:
sin(θ) = Opposite / Hypotenuse

Cosine Function:
cos(θ) = Adjacent / Hypotenuse

Tangent Function:
tan(θ) = Opposite / Adjacent

3) What is equal to cos θ?

Answer is:

Adjacent Side/Hypotenuse

Explanation:

Sine Function:
sin(θ) = Opposite / Hypotenuse

Cosine Function:
cos(θ) = Adjacent / Hypotenuse

Tangent Function:
tan(θ) = Opposite / Adjacent

4) What is equal to tan θ?

Answer is:

Opposite Side/Adjacent Side

Explanation:

Sine Function:
sin(θ) = Opposite / Hypotenuse

Cosine Function:
cos(θ) = Adjacent / Hypotenuse

Tangent Function:
tan(θ) = Opposite / Adjacent

5) What is the value of tan θ if sin θ = 4/5 ?

Answer is:

(4/3)

Explanation:

Sine Function:
sin(θ) = Opposite / Hypotenuse =4/5, means that in the right-angled triangle, the opposite side is 4 and the hypotenuse is 5. the adjacent side must therefore be 3. (Pythagorean triple 3,4,5)

Tangent Function:
tan(θ) = Opposite / Adjacent = 4/3