Plot the image of point P under a translation by 4 units to the left and 3 units down.
1 answer:
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Answer:
b ≈ 148.5
Step-by-step explanation:
Using the tangent ratio in the right triangle
tan68° = =
Multiply both sides by 60 to clear the fraction
60 × tan68° = b, thus
b ≈ 148.5 ( to 1 dec. place )
Answer:
y = 2sin(x/2 - pi/4) + 1
Step-by-step explanation:
The normal sine has a range of [-1, 1]. This one has a range of [-1, 3], so the amplitude is 2 times higher (4 vs 2).
After that, 2sin(x) has a range of [-2, 2], but this one has a range of [-1, 3], so we need to shift it upwards by 1.
We now know that the answer is 2sin(____)+1.
A normal sine has it's middle point while rising at x = 0, but this one has it at x = pi/2 - so we need to shift a sine to the right by pi/2.
Lastly, a sine has a cycle of length 2pi, but this one has a cycle of length 4pi. We can achieve that by dividing the argument 2.
We now know that the answer is 2sin(x/2 - pi/4) + 1. We can plot it to verify.
