Identify the benchmark you can use to find an equivalent percent for the ratio. Then find the equivalent percent.
1 answer:
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Solve the trigonometric equation:
Make a substitution:
and the equation becomes
Rewrite conveniently – t as + t – 2t, and then factor the left-hand side by grouping:
Factor out 2t + 1:
Substitute back for t = cos x:
Therefore,
where k is an integer.
Solution set:
I hope this helps. =)
——————————
Solve the trigonometric equation:
Make a substitution:
and the equation becomes
Rewrite conveniently – t as + t – 2t, and then factor the left-hand side by grouping:
Factor out 2t + 1:
Substitute back for t = cos x:
Therefore,
where k is an integer.
Solution set:
I hope this helps. =)
Answer:
C
Step-by-step explanation:
We have:
Where a<0.
We would like to solve for a. So, let’s divide both sides by a.
Notice that a<0. Therefore, a is negative. Hence, we must flip the sign since we are dividing by a negative. This yields:
Now, we will subtract b from both sides. Therefore, our inequality is:
Hence, our answer is C.