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Given the sum of sec and tan, Find the value of csc and cot (Posted on 2023-10-27) Difficulty: 3 of 5
Given that:
sec x+tan x=22/7.

Determine the value of:
csc x + cot x

  Submitted by K Sengupta    
Rating: 5.0000 (1 votes)
Solution: (Hide)
(1+sinx)/cos x = 22/7
And, csc x + cot x = (1+cosx)/sinx
Then, ((1+sinx)/cos x)((1+cosx)/sinx)
= (1+ sin x+ cos x+ sin x. cos x)/(sin x.cos x)
= ( sin^2x+ cos^2x + sin x +cos x + sinx.cos x)/(sin x. cos x)
= (1+ (sinx (1+sin x) +cosx (1+cosx)/sin x.cosx)
= 1+ ((1+sin x)/cosx)((1+cos x)/sin x)
Therefore, we must have:
(22/7)*((1+cos x)/sinx) = 1+ 22/7+ ((1+cos x)/sin x)
=> (15/7)*(1+cosx)/sinx = 29/7
=> (1+ cos x)/sin x = 29/15
=> csc x + cot x = 29/15

Comments: ( You must be logged in to post comments.)
  Subject Author Date
No SubjectK Sengupta2023-11-20 10:38:51
WirterGeyger2023-11-19 11:24:22
Solutionthe hard wayLarry2023-10-27 12:31:53
SolutionPossible solutionJer2023-10-27 08:44:32
Solutioncomputer answerCharlie2023-10-27 08:39:51
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