Trig identities 3

What is csc(x) equivalent to?

• $\frac{1}{\sin x}$

• $\frac{1}{\tan x}$

• sin(x)

• $\frac{1}{\cos x}$

Please select the correct solution

• csc² x
• cot² x
• sin² x
• sec² x

Please select the correct solution 
cos ² x + sin ² x=  

• 1
• csc ² x + sec ² x
• sin ² x
• 1 - sin ² x

Please select the correct solution

• csc x
• sec x
• cot x
• tan x

Simplify

• sin²θ
• cosθ
• tanθ
• 1- sin²θ

Simplify

• -1
• sin θ
• csc θ
• 1

 $1-\cos^2x=?$  

•  $\cot^2x$  

•  $\tan^2x$  

•  $\csc^2x$  

•  $\sin^2x$  

Answer explanation

Remember the Pythagorean Identity:  $1=\sin^2x+\cos^2x$ 
In this question, all they did was subtract  $\cos^2x$   from both sides. Can you see that?

cos²x + sin²x = 3

• no solution

• 1

• tan²x

• π²

Answer explanation

Remember: cos²x + sin²x = 1