<span>OK, here's a *very* approximate "creative" method:
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sin(a+b)=sin(a)cos(b) + cos(a)sin(b) </span>
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choose a=30deg and b=5deg </span>
- sin(a)=0.5 (exact)
- b is a small number so we say sin(b)~b (in radians). We can do a long division for this: 3.14/36 = 0.087 radians
- similarly, for b sufficiently small, cos(b)~1
<span>- now we only need cos(a) = sqrt(3)/2. We can approximately calculate sqrt(3) as 1.73, (by trial-and-error or better, by using the Babylonian method; so sqrt(3)/2 = 0.865 </span>
<span>
Finally, sin(30 + 5) = (0.5 x 1) + (0.087 x 0.865) = 0.575 (calculating more digits is of no use because the sin(b)=b and cos(b)=1 are quite inaccurate approximations). </span>
<span>So that wasn't all too much effort, and we're close to the correct answer (0.574)
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
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Answer:
(1 + y)(x + 2y)
hope this is right
Step-by-step explanation:
First, the item goes on sale for 25% discount which means that the price will now be only 75% of the original price.
Case 1: Price = ($80)(0.75) = $60
Then, the item is sold for additional discount of 10% which the new price is only 90% of the supposed price.
Case 2: Price = ($60)(0.90) = $54
Answer: $54
Answer:
It would be 210 words per minute
Step-by-step explanation: since 70 in 20 is 1/3 multiply 70x3 and there´s your answer
Answer:
9.5%
Step-by-step explanation:
326 - 295 = 31
What percent is 31 of $326 (%/100 = is/of)
X/100 = 31/326
(31*100)/326
9.5%
