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Grade: 11 

                        
Please Explain the following Question …........................
2 years ago

Answers : (1)

Avinash
12 Points 
							
I am not able to write the answer properly in this software. However, please try to understand.
sinx + cosx = \sqrt{2} sin(x + pi/4)
\lim_{x\rightarrow 5\pi /4} [\sqrt{2} sin(x + pi/4) ]  
Both LHL and RHL = – 2 ( because sin(x + pi/4) value will be -1 at 5pi/4, and muliplication by \sqrt{2} will make the value -\sqrt{2}. Greatest integer value for – \sqrt{2} will be -2.
Hence, answer has to be – 2.
2 years ago
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