Revision for grade 11

Simplify: sin x cot x

• cos x

• sinx

• tan x

• csc x

tanθ=

• 1/tanθ

• 1/sinθ=

• 1/cotθ=

• 1/cscθ=

 $Simplify:\tan x\cot x-\cos2x$  

• tan x

• cotx

•  $\cos^2x$  

•  $\sin^2x$  

Is this a Pythagorean identity?

tan²x + 1 = sec x

• yes

• no

The expression sin A ( csc A -sin A) is equivalent to

• 1

• $-\sin^2A$

• cos A

• $\cos^2A$

How many degrees does circle have?

• 360 degrees

• $2\pi$

• $180\degree$

• $\pi$

What is the co-terminal angle of 210⁰ ?

• $-30\degree$

• $-150\degree$

• $-40\degree$

• $150\degree$

What is 3π/4 radians in degrees?

• 315

• 135

• 150

• 330

What is 45 degrees in radians?

• $\frac{\pi}{2}$

• $\frac{\pi}{6}$

• $\frac{\pi}{4}$

• $\frac{3\pi}{4}$

What is the length of side x?

• 7.44 cm

• 6 cm

• 5 cm

• 6.57