In need of trig help..love ya!

I couldnt figure out some of my trig problems...so Im having a bit of trouble wasting time on these problems. Any help would be great. Thanks

Evaluate the expressions:

cos(arcsin 1/4) couldnt figure out what arcsin 1/4 was...maybe 22.5 degrees?

csc(arccsc -2)

arccos(cos pi/2)

cos(arcsin 3/5 +arccos sqrt3/2)

sec^2x-2=tan^2x

sin^2+sin x=0

Use a calculator to find the value. Give answers as real numbers.

sin(arccos .8324)

tan(arcsin 2)

Write the following as an algebraic expression in u, u>0

cos(arctan u)

sin 2theta =-1/2

Solve the equation for the interval [0,2pi)

cos^2x + 2cos x+1-0

Solve the equation for solutions in the interval [0, 360). Round to the nearest degree.

sin 2theta =cos theta

sin 2theta= -1/2

sqrt3 sec2theta =2

Solve the equation for x

y=8 cos 3x

Solve the equation for exact solutions.

arcsin(y-pi/6) = pi/3

arctanx = arcsin 7/25

Solve the equation.

arcsin 2x +2 arccos x=pi