Chapter 12 Sine, Cosine, And Tangent

Question 1

Inverse of Soh Cah Toa

Answer 1

This is used when the angle is missing. DO NOT DIVIDE BY SIN/COS/TAN OF NOTHING!!!!

Question 2

Angle of depression and elevation

Answer 2

THEY ARE AIA TO EACH OTHER NOT SSI
\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
   \ Depression
     \
       \
         \
           \
             \
Elevation\
--------------------

Question 3

Law of Sines (ASA)

Answer 3

DO NOT USE TO FIND OBTUSE ANGLES
Used for non right triangles
SinA/a=SinB/b=SinC/c

Question 4

Law of Cosines (SAS and SSS)

Answer 4

c^2=a^2+b^2-2(a)(b)cosC°

Question 5

Heron’s Formula (SSS)

Answer 5

Area of an SSS triangle
A={Sqr. of s(s-a)(s-b)(s-c)}
S=1/2(a+b+c) (S is the semi perimeter.)

Question 6

Soh Cah Toa

Answer 6

(Sin) Sine is opposite over hypotenuse
(Cos) Cosine is adjacent over hypotenuse
(Tan) Tangent is opposite over adjacent