Quiz # 13: Trigonometry - Finding Angles

Using a scientific calculator, what is $\theta$ when sin $\theta$  = 0.5?
(Degrees is assumed as your unit. Please do NOT write the degree symbol, just the angle number; thanks.)

Using a scientific calculator, what is θ when tan θ= 1?

(Degrees is assumed as your unit. Please do NOT write the degree symbol, just the angle number; thanks.)

Using a scientific calculator, solve θ when cos θ = 0.5?

(Note: Degrees is assumed as your unit. Please do NOT write the degree symbol, just the angle number; thanks.)

If $\tan\theta=\frac{3}{4}$  , what is θ?
(Use a scientific calculator at desmos.com/scientific if you do not have one)

•  $33\degree$  

•  $37\degree$  

•  $63\degree$  

• not enough information

If  $\sin\theta=\frac{4}{5}$  , what is θ?

•  $37\degree$  

•  $40\degree$  

•  $50\degree$  

•  $53\degree$  

Find the ratio for sin C. 
Note: <C is the measured angle to help determine the opposite and adjascent sides.

• $\frac{21}{35}$

• $\frac{28}{21}$

• $\frac{35}{28}$

• $\frac{28}{35}$

Find the ratio for cos A.

Note: A is the measured angle

• $\frac{30}{16}$

• $\frac{30}{34}$

• $\frac{16}{34}$

Find tangent of θ.

• $\frac{8}{12}$

• $\frac{23}{12}$

• $\frac{12}{8}$

• $\frac{12}{23}$

Solve for the missing angle

• 32°
• 44°
• 61°
• 50°

Tags

CCSS.HSG.SRT.D.11

CCSS.HSG.SRT.D.10

To solve for the missing angle, what trig equation do we set up?

• $x=\sin^{-1}\left(\frac{300}{400}\right)$

• $x=\cos^{-1}\left(\frac{300}{400}\right)$

• $x=\tan^{-1}\left(\frac{300}{400}\right)$

• $x=\tan^{-1}\left(\frac{400}{300}\right)$

Tags

CCSS.HSF.TF.B.7

CCSS.HSG.SRT.C.6

CCSS.HSG.SRT.C.8