SOHCAHTOA
Reciprocal and Quotient Identities
Pythagorean Identities
Simplifying Trig
Verifying Trigonometric Identities
100

opp/hyp

Sine

100
sinθ
What is 1/cscθ?
100
sin^2u + cos^2u
What is 1?
100

Simplify 

cot(x)sin(x)

What is 

cos(x)?

100
1 + (1/cotu)^2
What is sec^2u?
200

Adj/hyp

Cosine

200
secθ
What is 1/cosθ?
200
1 - sin^2u
What is cos^u?
200

Simplify 

tan(x)/sec(x)

What is 

sin(x)?

200
1-sin^2u/sin^2u
What is cot^2u?
300

Opp/Adj

Tangent

300
cotθ
What is 1/tanθ?
300
1 + tan^2u?
What is sec^2u?
300

Simplify 

sec(x)cos(x)

What is 1?

300
sinu-cscu
What is -cos^u?
400

Adj/Opp

Cotangent

400
tanθ (Quotient form)
What is sinθ/cosθ?
400
tan^2u
What is sec^2u - 1?
400

Simplify 

cot(x)/csc(x)

What is 

cos(x)?

400
2 - sin^2u
What is sin^2u?
500

Opp*Adj/Adj*Opp

1

500
cotθ (In terms of secants)
What is cscθ/secθ?
500
csc^2u
What is 1 + cot^2u?
500

Simplify 

(sin^2(x)+cos^2(x))/cos(x)

What is 

sec(x)

500
tanu - sinucotu/secu
What is sinu-cosu/secu?
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