Find the exact value of sin 225º without using a calculator
2 answers:
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Answer:
k = 5
Step-by-step explanation:
When a certain number is multiplied by a scale factor
, the final number is given by
and the final number will be:
- Larger than the original number if
- Smaller than the original number if
In this problem, the number represents the size of the decoration.
If we apply the 4 scale factors given, we have:
- If , then
: this means that the final decoration is larger than the original decoration --> this is the correct option
- If , then
: so the final decoration has same size as the original decoration
- If , then
: so the final decoration is smaller than the original decoration
- If , then
, so the final decoration is smaller and inverted