Question

Use triangle PQR for questions 2-4. What are the values of the trigonometric ratios for R in this triangle?

2. What is the value for sin R? Enter your answer as a fraction.


3. What is the value for cos R? Enter your answer as a fraction.


4. What is the value for tan R? Enter your answer as a fraction

Answer 1

Explanation:

remember, sine is the up/down leg, cosine is the left/right leg.

the Hypotenuse is the radius of the circle around the trigonometric triangle.

so,

sin(R) = 5/13

cos(R) = 12/13

tan(R) = sin(R)/cos(R) = 5/13 / 12/13 = (5×13)/(13×12) =

= 5/12