Find the 15th term of the arithmetic sequence.
2 answers:
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Answer:
D. 1
Step-by-step explanation:
We have the expression,
We get, eliminating the cosecant function,
As, sinx is reciprocal of cosecx and cosx is reciprocal of secx,
i.e.
i.e.
Since, we know that,
Thus,
So, after simplifying, we get that the result is 1.
Hence, option D is correct.