What is the fourth term in this multiplication pattern? multiplication pattern using the formula 2 • 6n – 1 A. 72 B. 12 C. 432 D
1 answer:
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By definitions of the (co)tangent and cosecant function,
Turn everything into fractions with common denominators:
Recall that , so we can simplify both sides a bit.
On the left:
On the right:
(as long as , which happens in the interval
when
or
)
So we have