Question

how I will solve this??

Answer 1

Hey Mate!!!!

Since you have the value of cos A which is just equivalent to BASE/HYPOTENUSE so....

$base = 5 \: and \: hypotenuse = 13 \\ \\ now \: perpendicular = 12 \: \: \: (by \: pythagoras \: theorem)$
Now
Since the values are here you can put them into each equation