If sin θ = 3/5, then cos θ =
Solution
sin²θ + cos²θ = 1 → cos²θ = 1 - 9/25 = 16/25 → cos θ = 4/5 (θ acute).
About this question
Subject: Mathematics · Chapter: Trigonometric Functions · Topic: Trigonometric Ratios and Identities
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