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Question
sin 43° = cos θ, ∴ θ = ______.
Options
43°
47°
57°
133°
MCQ
Fill in the Blanks
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Solution
sin 43° = cos θ, ∴ θ = 47°.
Explanation:
sin x = cos(90° − x), sin 43° = cos 47°
cos θ = cos 47°
= θ = 47°
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