Eli walked 12 feet down the hall of his house to get to the door. He continued in a straight line out of the door and across the
yard to the mailbox,a distance of 32 feet.He came straight back across the yard 14 feet and stopped to pet his dog
1 answer:
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Answer:
See steps below
Step-by-step explanation:
We need to work with each side of the equation at a time:
Left hand side:
Write all factors using the basic trig functions "sin" and "cos" exclusively:
now, let's work on the right side, having in mind the following identities:
a)
b)
c)
Then replacing we get:
Therefore, we have proved that the two expressions are equal.