CK-12-Pre-Calculus Concepts

4.4. Right Triangle Trigonometry http://www.ck12.org

2. Drawing out the triangle, it looks like:

sin 1=^3 z

z=sin 1^3 ≈ 3. 6

3. Drawing out the triangle, it looks like:

tanM=^1214

M=tan−^1

( 12

14

)

≈ 0. 7 radian≈ 40. 6 ◦

Practice

For 1-15, information about the sides and/or angles of right triangleABCis given. Completely solve the triangle
(find all missing sides and angles) to 1 decimal place.

TABLE4.9:

Problem

Number

A B C a b c