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.
if 
and 
and the angles 
and 
are acute?
.
and obtain the range of function.
is 1.
given 
in the figure below.
, 
and 
(find both possible solutions).
if 
and 
are the angles in the figure below, the line lengths 
, 
and 
, the lines 
and 
are perpendicular.
given that 
and 
. Rationalize the result.
, 
and 
are acute angles of a triangle. Prove that 
if 
and 
.
is given.
.
.
