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Answer:
cos4B =1-8sin^2(B)+8sin^4(B)
Step-by-step explanation:
cos4B =1-8sin^2(B)+8sin^4(B)
Answer:
n = 17

Step-by-step explanation:

n · 170 = 34 · 85
170y = 2890
170y ÷ 170 = 2890 ÷ 170
y = 17
Answer:
10
Step-by-step explanation:
12(10)=120+30 or 150-30=120=12(10)