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Grade: 11
        
How do you solve this question? The answer is B....................
11 months ago

Answers : (3)

Saurabh Koranglekar
askIITians Faculty
3160 Points
							576-1736_1.PNG
						
11 months ago
Aditya Gupta
1672 Points
							
as uaual, saurabh’s answer is once again wrong. so lemme give u the correct answer. it comes as quite a surprise to me that he is a faculty!
A > 90
180 – (B+C) > 90
or B+C
B
since B lies in 0 to 90, and 0
now obviously tan is a strictly increasing function in 0 to 90. hence
tanB
or tanB
or tanBtanC
 
11 months ago
Aditya Gupta
1672 Points
							
technical error so answer didnt show up.
B is less than 90 – C
taking tan both sides coz it is a strictly increasing function in 0 to 90,
tanB is less than tan(90 – C)
tanB is less than cotC
tanB is less than 1/tanC
tanBtanC is less than 1
11 months ago
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