Pie over 4 is the reference angle for
1 answer:
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Answer:
C
Step-by-step explanation:
Using sum/difference to product identity
• sin x - sin y = 2 cos() sin (
)
with x = 4Θ and y = 2Θ
Then
sin(4Θ) - sin(2Θ)
= 2 cos() sin(
)
= 2cos(3Θ)sinΘ → C
Answer:
4y²-1/4 is the required answer
Step-by-step explanation: