Cos 210 is equal to -cos 30 cos 30 -sin 30 sin 30
2 answers:
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Answer:
The formula is:
Step-by-step explanation:
The geometric sequences are those in which the division between the terms and
of the sequence are equal to a constant common reason called "r"
The geometrics secencias have the following form:
Where is the first term of the sequence
In this sequence we have the following terms
1.2, 3, 7.5, 18.75
Then notice that:
Then:
and
Finally the formula is: