Answer:

Step-by-step explanation:
Given

Required
Determine an equivalent expression
In trigonometry:

In 

Substitute
for
in 


Hence, the equivalent expression is: 
Answer:
186.3
Step-by-step explanation:
Answer:
I think Explanation:
y
∝
1
x
2
or
y
=
k
⋅
1
x
2
or
x
2
⋅
y
=
k
;
x
=
5
,
y
=
3
∴
k
=
5
2
⋅
3
=
75
or
x
2
⋅
y
=
75
Step-by-step explanation: