Answer
$\sin 23^{\circ}$ = $0.3907$
$\cos 67^{\circ}$ = $0.3907$
Thus, results justify the Cofunction Theorem.
Work Step by Step
Given pair is-
$\sin 23^{\circ}$ , $\cos 67^{\circ}$
Using calculator in degree mode-
(23 → $\sin$) and ( 67 → $\cos$)
$\sin 23^{\circ}$ = $0.3907311285$
Rounding to four places past the decimal point-
$\sin 23^{\circ}$ = $0.3907$
$\cos 67^{\circ}$ = $0.3907311285$
Rounding to four places past the decimal point-
$\cos 67^{\circ}$ = $0.3907$
Hence-
$\sin 23^{\circ}$ = $\cos 67^{\circ}$
Thus, results justify the Cofunction Theorem.
