Hello again! I got some basic trig questions...

Complete the following list:

sin A =$\displaystyle $\dfrac{a}{c}$$ (this one was done as an example)

sin B =$\displaystyle $\dfrac{b}{c}$$

m∠A + m∠B =90°

cos A =$\displaystyle $\dfrac{b}{c}$$

cos B =$\displaystyle $\dfrac{a}{c}$$

ac^{2}+ b^{2}=^{2}

tan A =$\displaystyle $\dfrac{a}{b}$$

tan B =$\displaystyle $\dfrac{b}{a}$$

Circle the following statement we can conclude from the information above.

(A) sin A = cos B

(B) cos A = sin (90 -A)

(C) sin^{2}B + cos^{2}B = 1

(D) All of these

[I think it's A or D]

Complete the following:

sin 45° =$\displaystyle $\dfrac{1}{ \sqrt[]{2}}$$ =$\displaystyle $\dfrac{ \sqrt[]{2}}{2}$$ (this one was done as an example)

sin 30° =

cos 45° =

cos 30° =

tan 45° =

tan 30° =

[I actually do not understand what they are asking me to do here. If someone could explain what's being asked I'd really appreciate it.]

13. Circle the item below that is equal to $\displaystyle \sqrt{3}$

(A) sin 60° (B) tan 60° (C) cos 60° (D) tan^{-1}$\displaystyle $\dfrac{ \sqrt[]{3}}{3}$$

[I think it's B]