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neonofarm [45]
1 year ago
11

Please help!!!!!!!!!!!!!!!!!!!

Mathematics
2 answers:
kvasek [131]1 year ago
7 0
The answer is 70 to 80 students.
professor190 [17]1 year ago
4 0

Answer:

70-80

Step-by-step explanation:

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Step-by-step explanation:

Given the expression

40=\frac{90^2}{16}  sinxcosx\\\\Cross\ multiplying;\\\\16*40 = 90^2 sinxcosx\\\\640 =  90^2 sinxcosx\\\\\frac{640}{8100} = sinxcosx\\ from\ trig\ identity, sin2x = 2sinxcosx\\sinxcosx = sin2x/2\\

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