Co-functions-Trig ratios 2026

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

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

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

• tan∠A = tan∠B

• sin∠A = sin∠B

• cos∠A = tan∠B

• sin∠A = cos∠B

Tags

CCSS.HSF.TF.C.8

In right triangle ABC, m∠C =90°. If cos B= 5 ⁄ 13, which function also equals 5 ⁄ 13?

• tanA

• tanB

• sinA

• sinB

Tags

CCSS.HSF.TF.C.8

In scalene triangle ABC shown in the diagram above, m∠C = 90°. Which equation is always true?

• sinA=sinB

• cosA=cosB

• cosA=sinC

• sinA =cosB

Tags

CCSS.HSF.TF.C.8

If cos 32° = sinx, find the number of degrees in the measure of acute angle x.

• 32

• 78

• 58

• 68

Tags

CCSS.HSF.TF.B.7

• 18/30

• 24/30

• 18/24

• 24/18

Tags

CCSS.HSG.SRT.C.6

• A

• B

• C

• D

Tags

CCSS.HSG.SRT.C.6

What is the correct ratio?

• 7/24
• 24/7
• 7/25
• 24/25

Tags

CCSS.HSG.SRT.C.6

Which expression is always equivalent to sin x when 0°< x < 90°?

• cos(90°−x)

• cos(45°−x)

• cos(2x)

• cos x

Tags

CCSS.HSF.TF.C.9