SOLUTION: I have to find the exact value for this trigonometric expression. Help? :( cos (sin^-1 (1/4)) = ??

SOLUTION: I have to find the exact value for this trigonometric expression. Help? :( cos (sin^-1 (1/4)) = ??

Algebra.Com

Question 1030473: I have to find the exact value for this trigonometric expression. Help? :(
cos (sin^-1 (1/4)) = ??
Answer by fractalier(6550) (Show Source): You can put this solution on YOUR website!
Draw a triangle such that the sine of an angle is 1/4. Then the adjacent side is sqrt(16-1) = sqrt(15).
The cosine of that same angle is sqrt(15)/4.
RELATED QUESTIONS
I have to find the exact value for this trigonometric expression. Help? :( cos^-1 (cos... (answered by fractalier,Cromlix)

I have to find the exact value for this trigonometric expression. Help? :( tan(cos^-1... (answered by fractalier)

I have to find the exact value for this trigonometric expression: sec(30)- cos(7/4)= ??? (answered by Alan3354)

I have to find the exact value for this trigonometric expression. Help? :( tan^-1... (answered by fractalier)

1-Find the exact value of this expression. sin^-1(-1/2) 2-Find the exact value of this (answered by stanbon)

I have to find the exact value for this expression: tan (cos^-1(1/3)) = ???... (answered by Alan3354)

Evaluate a composite trigonometric expression: Find the exact value of COS(SIN raised... (answered by MathLover1)

I have to find the exact value for this expression: sin 260 degrees cos 20 degrees - cos... (answered by Boreal)

I have to find the exact trigonometric expression for: sec (30�) - cos(7π/4)=... (answered by ikleyn)