please solve my question....
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Answer:
2 sinθ - cosθ = 2
Step-by-step explanation:
Given: sinθ + 2 cosθ = 1.
On Squaring both sides, we get
⇒ (sinθ + 2 cosθ)² = 1
⇒ sin²θ + 4 cos²θ + 4 sinθ cosθ = 1
⇒ (1 - cos²θ) + 4(1 - sin²θ) + 4 sinθ cosθ = 1
⇒ 1 - cos²θ + 4 - 4 sin²θ + 4 sinθ cosθ = 1
⇒ 5 - cos²θ - 4 sin²θ + 4 sinθ cosθ = 1
⇒ -(cos²θ + 4 sin²θ - 4 sinθ cosθ) = 1 - 5
⇒ cos²θ + 4 sin²θ - 4 sinθ cosθ = 4
⇒ 4 sin²θ + cos²θ - 4 sinθ cosθ = 4
⇒ (2 sinθ - cosθ)² = 4
⇒ 2 sinθ - cosθ = √4
⇒ 2 sinθ - cosθ = 2.
Hope it helps!
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