Question

Choose all possible expressions that can be used to find the length of side RS

A. 35 sin(R)

B. 21 tan(T)

C. 35 cos(R)

D. 21 tan(R)

Answer 1

B and C

Explanation:

tan (T) = RS/ST = RS/21
⇒ RS = 21tan (T) (choice B)

cos(R) = RS/RT = RS/35
⇒ RS = 35 cos(R) choiice C

tan(R) = 21/RS so that would give RS = 21/tanR not 21 tanR so choice D is out

sin(R) = 21/35 which would give 35 sin(R) = 21 so choice A is out