Solve the question in photo...
Asked by Vidushi412
31st March 2019,
9:10 PM
Answered by Expert
Answer:
Numerator Nr = | sin x | - |cos x| varies from -1 to +1
Nr = -1 , when x = nπ , where n = 0, 1, 2......
Nr = +1 , when x = n (π/2) , where n = 1,2,3,.........
when Nr reaches the extreme values -1 or +1, Denominator Dr = | sin x | + |cos x| = 1
Denominator function Dr varies from 1 to 1.5 .
Since sin x and cos x are complimentary function i.e when one of them reaches maximum 1 otherone will be at minimum 0,
their sum always start from 1 and maximum 1.5 occurs , when | sin x | and | cos x | both are equal , ie at x= (2n+1)(π/4), n=0,1,2,3...
when denominator reaches maximum 1.5, Numerator is zero.
Hence overall effect of the function is it varies from minimum value -1 to maximum value +1,
mimimum occurs at x = nπ , n=0,1,2......
maximum occurs at x = (2n+1)(π/2) , n =0,1,2...
hence difference between sucessive minimum or maximum is π . Hence period is π
Answered by Expert
1st April 2019,
10:29 AM
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