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# Check Homework PowerPoint PPT Presentation

Check Homework. PRE. Lesson 7.4: Inverse Trig Functions. Objectives: To define the inverse of the sine, cosine, and tangent functions. To understand the domain and range of the inverse trig functions. Inverse Sine. Inverse Sine (arcsin).

Check Homework

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Check Homework

PRE

Lesson 7.4: Inverse Trig Functions

• Objectives:

• To define the inverse of the sine, cosine, and tangent functions.

• To understand the domain and range of the inverse trig functions.

Inverse Sine

Inverse Sine (arcsin)

The inverse of the function sin is the function sin–1 defined by: for –1 ≤ x ≤ 1 and –π/2 ≤ y ≤π/2.

sin y = x sin–1x = y

Example 1. Find the exact value of the expression if it is defined:

• sin–1 ½

• sin–1 (–½)

• sin–1 (3/2)

Inverse Cosine

Inverse Cosine (arccos)

The inverse cosine functionis the function cos–1with domain [–1, 1] and range [0, π], defined by:

cos y = x cos–1 x = y

Example 2. Find the exact value of the expression if it is defined:

• cos–1

• cos–1 (0)

• cos–1 (5/7)

Inverse Tangent

Inverse Tangent (arctan)

The inverse tangent functionis the function tan–1with domain and range (–π/2, π/2) defined by: tan y = x tan–1 x = y

Example 3. Find the exact value of the expression if it is defined:

• tan–1 (1)

• tan–1 ( )

• tan–1 (-20)

Ex 4. Find the exact value of the expression, if it is defined.

a.)

b.)

c.)

Classwork:Book; pg. 557: 1,4,6,7,10,11,13,16,18,

21, 26,53,54

Classwork:Book; pg. 557: 1,4,6,7,10,11,13,16,18,

21, 26,53,54