Por is used when you are referring to motion like by or a period of time and para is for talking about the destination like in order TO or about TO.
Example: Para sacar buenas notas. To get good grades.
La galleta es por tú. The cookie is for you.
Hope this helps
2. B- This is asking what emotion would best describe, "we made a goal".
3. D
Answer:
√3sinA-cosA=√2
dividing both side by (√3²-1²=2 we get)
√3/2 sinA-1/2.cos A=√2/2
cos 30sinA-sin30cosA=√2/(√2×√2)
sinAcos30-cosAsin30=1/√2
sin(A-30)=sin45,sin(180-45)
therefore
A-30=45,135
A=45+30=75 or A=135+30=165
Camináramos, walk in spanish