Let G 1 and G 2 be context-free grammars, generating the languages L ( G 1 ) and L ( G 2 ) respectively. Show that there is a context-free grammar generating each of these sets. a) L ( G 1 ) ∪ L ( G 2 ) b) L ( G 1 ) L ( G 2 ) c) L ( G 1 ) *
Let G 1 and G 2 be context-free grammars, generating the languages L ( G 1 ) and L ( G 2 ) respectively. Show that there is a context-free grammar generating each of these sets. a) L ( G 1 ) ∪ L ( G 2 ) b) L ( G 1 ) L ( G 2 ) c) L ( G 1 ) *
Solution Summary: The author explains the concept of a phrase structure grammar, where terminals are some elements of vocabulary that cannot be replaced by other symbols.
Let
G
1
and
G
2
be context-free grammars, generating the languages
L
(
G
1
)
and
L
(
G
2
)
respectively. Show that there is a context-free grammar generating each of these sets.
Students were asked to simplify the expression (secØ - cosØ)/secØ Two students' work is given.Student A: step 1 secØ/secØ - cosØ/secØstep 2 cosØ/1 - (1/cosØ)step 3 1 - cos^2Østep 4 sin^2ØStudent B: step 1 (1/cosØ)-cosØ)/secØstep 2 (1 - cos^2Ø/cosØ)/secØstep 3 sin^2Ø/cos^2Østep 4 tan^2ØPart A: Which student simplified the expression incorrectly? Explain the errors that were made or the formulas that were misused.Part B: Complete the student's solution correctly, beginning with the location of the error.
Although 330° is a special angle on the unit circle, Amar wanted to determine its coordinates using the sum and difference formulas.Part A: Determine cos 330° using the cosine sum identity. Be sure to include all necessary work.Part B: Determine sin 330° using the sine difference identity. Be sure to include all necessary work.
A public health researcher is studying the impacts of nudge marketing techniques on shoppers vegetables
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