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if 
and 
and the angles 
and 
are acute?
given that 
and 
.
given that 
and 
.
where x is in the fourth quadrant. Calculate the values of the following in surd form:
and 
find:
.
and obtain the range of function.
is an acute angle and 
. Calculate 
.
.
if 
and 
is acute.
and x is an acute angle.
