If sin θ = 8/17 and θ is acute then what is cos θ?
यदि sin θ = 8/17 और θ acute है तो cos θ क्या होगा?
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Correct Answer
B. 15/17 / 15/17
ExplanationStep 1: Use identity sin²θ+cos²θ=1. Step 2: cos²θ=1-64/289=225/289 so cosθ=15/17. Step 3: For acute angle take the positive value.
Step 1: Identity sin²θ+cos²θ=1 लगाएं। Step 2: cos²θ=1-64/289=225/289 इसलिए cosθ=15/17 है। Step 3: Acute angle में positive value लें।