Verifying Trig. Identities

When verifying you must first ...

• pick a side to simplify 
• find a trig. identity 
• Change to sine and cosine
• Change Values

• the left side because it is more complicated.

• the right side because it is simpler.

• either side because it doesn't matter.

• neither side - stop this madness!

Simplify this to a basic trigonometry function:
tan(x)csc(x) 

• tanx
• secx
• cotx
• cscx

Simplify.

• sin x
• cos x
• tan x
• 1

True or False, tan(x)cot(x) = 1?

• True

• False

Which of the following would be a step to prove the following identity?

• (1/ sin x) - (1 / cos x)

• (cos x - sin x) / ( sin x)

• (cos x - sin x) / (cos x)

• (1/ sin x cos x)

True or False, cos(x)/cot(x) = sin(x)?

• True

• False

The first step in simplifying is...

• multiply 
• factor
• change to sine and cosine
• add or subtract

sin²θ=

• 1 - cos²θ
• 1 - sin²θ
• sec²θ - 1
• csc²θ - 1

Select all that are Pythagorean Identities.

• sin²(u) + cos²(u) = 1

• sin²(u) - cos²(u) = 1

• tan²(u) + 1 = sec²(u)

• cot²(u) + csc²(u) = 1

• cot²(u) + 1 = csc²(u)