If sin^-1 (x) + cos^-1(1/4) = pi/2, then value of x equals :
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Evaluate each of the following: (i)cos^(-1){cos(-pi/4)} (ii) c
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cos -pi/4 - YouTube
![cos cos-1 [-root3/2] +pi/4] - Maths - Inverse Trigonometric Functions - 4663334 | Meritnation.com](https://s3mn.mnimgs.com/img/shared/discuss_editlive/4135575/2013_05_03_18_00_33/mathmlequation7415618564480828664.png "cos cos-1 [-root3/2] +pi/4] - Maths - Inverse Trigonometric Functions - 4663334 | Meritnation.com")
cos cos-1 [-root3/2] +pi/4] - Maths - Inverse Trigonometric Functions - 4663334 | Meritnation.com
=1&line2=\mathrm{Solution:\:}x=-2%CF%80n%2B\frac{%CF%80}{4} "cos(pi/4-x)=1")
cos(pi/4-x)=1
Solved If cos(x)=-1/4 and pi | Chegg.com
&line2=\mathrm{Solution:\:}\frac{\sqrt{2}}{2} "cos(1/4 pi)")