QuestionEvaluate each expression. (a) $\sin x+\cos x+\tan x$ if $x=45^{\circ}$
NOTE: Enter the exact answer. (b) $(\sin x)^{-1}+(\cos x)^{-1}+(\tan x)^{-1}$ if $x=45^{\circ}$
NOTE: Enter the exact answer. $\square$ (c) $\sin ^{-1} x+\cos ^{-1} x+\tan ^{-1} x$ if $x=0.45$ NOTE: Round your answer to three decimal places. $\square$