![\sin x^{\circ}=\cos y^{\circ} \ [\text{Cofunctions rule}]](/tpl/images/0467/3947/7806a.png)
![\sin 18^{\circ}=\cos 72^{\circ}\ [\text{true}]](/tpl/images/0467/3947/deaf3.png)
![\sin 55^{\circ}\neq\cos 55^{\circ}\ [\text{false}]](/tpl/images/0467/3947/0f200.png)
![\sin 72^{\circ}=\cos 18^{\circ}\ [\text{true}]](/tpl/images/0467/3947/e6f5b.png)
Which of the following statements is true?
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Answers: 2
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