Question
Download Solution PDFIf cos 2θ = sin θ and θ lies between 0 and 90°, then θ will be:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
cos 2θ = sin θ
Identity used:
Sin (90° - θ) = cos θ
Calculation:
Cos 2θ = sin θ
⇒ Sin (90° - 2θ) = sin θ
⇒ 90° - 2θ = θ
⇒ 3θ = 90°
⇒ θ = 30°
Last updated on Jun 23, 2025
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