Answer:
Step-by-step explanation:
Several trig identities are involved in the proof of this. This is the order in which they are used.
- cos(2x) = cos²(x) -sin²(x)
- cos²(x) +sin²(x) = 1
- cos(x) = 1/sec(x)
<h3>Proof</h3>
Starting with the left side, we can transform it into the right side.

Answer:
63.3125 pounds or 63lbs and 5 ounces
Step-by-step explanation:
Answer:
=
Step-by-step explanation:
Answer:

Step-by-step explanation:
step 1
Find the value of y
we know that
In the right triangle of the figure

Remember that

so

Simplify

step 2
Find the value of x
In the right triangle of the figure

Remember that

so

