C is the answer because with this kind of math the answer can be Neg or Postive <span />
Answer:
Step-by-step explanation:
Given:
To find 
Using trigonometric relations for sums and differences of squares of the ratios.
We know:
Plugging in in the above relation.
Subtracting both sides by 0.75.
Taking square root both sides.
∴ (Answer)
Answer:
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Answer:
The simplified expression is:
Step-by-step explanation:
Given the expression
solving the expression
∵ 
∵ 
∵ 
Therefore, the simplified expression is:
Answer:
I don't know the answer to this one, sorry
