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1)to make a box from a sheet of cardboard 30X50 cm^2 size it is necessary to cut small squares out of its corner and to bend the sheet along the dashed lines as shown in figure(the figure has nothing in it with no extra detail to the question,it is exactly the thing which u can imagine after drawing 4 sides) 2)f(x)=sinx-cosx.prove that f(1)>0

1)to make a box from a sheet of cardboard 30X50 cm^2 size it is necessary to cut small squares out of its corner and to bend the sheet along the dashed lines as shown in figure(the figure has nothing in it with no extra detail to the question,it is exactly the thing which u can imagine after drawing 4 sides)

2)f(x)=sinx-cosx.prove that f(1)>0

Grade:

1 Answers

Jitender Singh IIT Delhi
askIITians Faculty 158 Points
7 years ago
Ans:
Hello Student,
Please find answer to your question below

The first question figure is not given and the question is incomplete.
Please rewrite your question so that I can provide you reasonable answer.
2)
f(x) = sinx - cosx
f(1) = sin1 - cos1
f(1) > 0
sin1 – cos1 > 0
sin1 > cos1
tan1 > 0
1 is lie between 0 and pi/2 the interval in which tanx is positive.
Hence, proved.

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