Prove that (Cosx-Cos³x)/Sinx=SinxCosx
1 answer:
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Answer:
The numbers are 27 and 12
Step-by-step explanation:
Let the smaller number be x and the larger number be y.
If the difference between them is 15, then
Also , four times the larger number is nine times the smaller.
From equation (1),
We put the 3rd equation into the 2nd to get:
Expand to get:
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Therefore the larger number is