Answer :

cos–1(cos x) = x


Provided x ϵ [0,π] ≈ [0,3.14]


And in our equation x is 4 which does not lie in the above range.


We know cos[2nπ – x] = cos[x]


cos(2nπ – 12) = cos(12)


Here n = 2.


Also 4π–12 belongs in [0,π]


cos–1(cos 12) = 4π–12


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

State True or FalMathematics - Exemplar

State True or FalMathematics - Exemplar

Fill in the blankMathematics - Exemplar

Fill in the blankMathematics - Exemplar

Find the principaRD Sharma - Volume 1

State True or FalMathematics - Exemplar

State True or FalMathematics - Exemplar