Co-Functions Practice

In triangle ABC below, angle C is a right angle. Which statement must be true?

• 1) sinA = cosB

• 2) sinA = tanB

• 3) sinB = tanA

• 4) sinB = cosB

Tags

CCSS.HSG.SRT.C.7

In ABC, the complement of ∠B is ∠A. Which statement is always true?

• 1) tan∠A = tan∠B

• 2) sin∠A = sin∠B

• 3) cos∠A = tan∠B

• 4) sin∠A = cos∠B

Tags

CCSS.HSG.SRT.C.7

The expression sin57° is equal to

• 1) tan33°

• 2) cos 33°

• 3) tan57°

• 4) cos 57°

Tags

CCSS.HSG.SRT.C.7

Find the cofunction of 
sin(42^o)=

• cos(42^o)
• cos(48^o)
• csc(48^o)
• csc(42^o)

Tags

CCSS.HSG.SRT.C.7

Two angles added together to produce 90 degrees

• Supplementary
• Complementary
• Right
• Vertical

Tags

CCSS.7.G.B.5

Find the cofunction of cos 50°

• tan 50°
• cot 40°
• sin 40°

• Cot 50^o

Tags

CCSS.HSG.SRT.C.7

Each trig function has a "cofunction" (Ex: sine and cosine are cofunctions).

How are cofunctions related to each other? (Check all that apply)

• Cofunctions of complementary angles are equal.

• Cofunctions are reciprocals of each other.

• Cofunctions are inverses of each other.

• Cofunctions are negatives of each other.

Tags

CCSS.HSG.SRT.C.7

In ∆ABC, where ∠C is a right angle,

cos A= √21 ⁄ 5 . What is sin B?

• √21 ⁄ 5

• √21 ⁄ 2

• 2 ⁄ 5

• 5 ⁄ √21

Tags

CCSS.HSG.SRT.C.7

Find the cofunction of cos(15^o)

• sin(75^o)
• sec(75^o)
• csc(75^o)
• cot(75^o)

Tags

CCSS.HSG.SRT.C.7

• Sin A

• Cos A

• Tan A

• Cos C

Tags

CCSS.HSG.SRT.A.2