Answer: Option d.
Step-by-step explanation:
The trigonometric identity needed is:

Knowing that
:
Substitute it into
:

Simplify the expression:

Solve for
. Apply square root at both sides of the expression:


The cabinet got do deside I think sorry if I’m wrong
Answer:
c, vertical
Step-by-step explanation:
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Answer:
I think it is B) 0
Step-by-step explanation: