Trigonometry: Cartesian Plane

Given: OP has been rotated through $\theta$  degrees such that OP has 8 units and P is the point (4;y) 
O is the origin.
 $\theta\ \epsilon\ \left[0\degree;90\degree\right]$  
Without the use of a calculator, what is the value of tan $\theta$  

If  $\cos\theta=\frac{7}{25}$  and  $\theta\epsilon\left[0\degree;90\right]$  
What is the value of  $\tan\theta\times\cos\theta$  1

If $\cos\theta=\frac{7}{25}$ and  $\theta\epsilon\left[0\degree;90\degree\right]$  
What is the value of  $\sin\theta$  ?

Which quadrant(s) is sin $\theta$  positive?

Which quadrant(s) is $\tan\theta$ negative? 

In the trigonometric ratios, r is always positive.

Is the above statement true or false?

Which of the following is the correct trigonometric ratio for sin $\theta$  ?

Which of the following is the correct trigonometric ratio for $\cos\theta$  ?

 Which of the following is the correct trigonometric ratio for  $\tan\theta$  ? 

Which quadrant(s) is cos $\theta$  positive?