What is the first term in a geometric sequence if the common ratio is −4 and the sum of the first four terms is −255?
1 answer:
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The complete question in the attached figure
we know that
sin40° = opposite side / hypotenuse
opposite side =AC
hypotenuse = AB-------> 10 in
so
sin 40=AC/AB---------> AC=AB*sin 40-------> AC=10*sin 40
the answer is
AC=10*sin 40
we know that
sin40° = opposite side / hypotenuse
opposite side =AC
hypotenuse = AB-------> 10 in
so
sin 40=AC/AB---------> AC=AB*sin 40-------> AC=10*sin 40
the answer is
AC=10*sin 40
The triangle ADC and the triangle CDB are similar. Therefore:
Answer: A 4.5
Answer: A 4.5