Trig Identities

The expression sinx(secx-cscx) is equivalent to:

• 1-tanx
• tanx-1
• 1-cotx
• sinx

cscx/secx is equivalent to

• tanx
• cosx
• sinx
• cotx

The expression sinA(cscA-sinA) is equivalent to

• 1
• -sin²A
• cos²A
• cosA

Tags

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

cscx - cotx =

• sinx-tanx
• 1
• 1/(sinxcosx)
• (1-cosx)/sinx

sec²θ + csc²θ =

• 1-tan²θ
• 1+tan²θ
• 1/(sin²θcos²θ)
• sin²θcos²θ

If cos (x +20⁰) = sin(x-10)
then x =

• 30
• 40
• 50
• 60

Tags

CCSS.HSF.TF.C.9

What is the value of sin210^ocos30^o - cos210^osin30^o is

• 0
• -1
• 1
• sin240^o

Tags

CCSS.HSF.TF.C.9

-sin(-x)/cos(-x) = 

• tanx
• -tanx
• cotx
• -cotx

Tags

CCSS.HSF.TF.A.4

sinx = 2/3 and x is in quad 1
siny = -7/9 and y is in quad 3
Find cos(x-y)

• 39/27
• (-4√10-14)/27
• -12/27
• (9√5 + 12√2)/27

Tags

CCSS.HSF.TF.C.9

sin(x+π) = 

• sinx
• cosx
• -sinx
• -cosx

Tags

CCSS.HSF.TF.C.9