Simplifying and Verifying Trig Expressions

There is only one way to approach each simplify/verify trig problem.

• True

• False

Which of the following is NOT a method we use for simplifying and verifying trig?

• Factor the expression

• Get a common denominator

• Convert everything to sine/cosine

• Use a pythagorean identity

• Divide everything by tangent

• Take out a GCF

• Get a common denominator 

• Convert everything into Sine & Cosine

• Use a Pythagorean Identity 

• csc²θ
• sec²θ
• cscθ
• 1

• csc²θ
• csc θ sec θ
• cot θ tan θ
• 1/sinθ

• csc x
• sec x
• 1/sec x
• cos x

Simplify the trigonometric expression sin x sec x. Given that sec x = ​ (a)   and tan x = ​ (b)   , the simplified expression is ​ (c)  

• tan x

• secθ
• cos²θ
• sin²θ
• sin²θ/cos²θ

• csc s
• tan s + 1
• cot s
• cot s + 1

Q1. What is the value of cos²x + sin²x?

• A) cos²x

• B) sin²x

• C) cot²x

• D) tan²x