The value of sin2 24° + sin2 66° + 2 tan 26° tan 64° is
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1
Answer:
3
Step-by-step explanation:
sin²24° + sin²66° + 2tan26° tan64°
=> sin²24° + cos²(90° - 66°) + 2tan26° cot(90° - 26°) [cos²(90° - θ) = sin²θ; cot(90° - θ) = tanθ]
=> sin²24° + cos²24° + 2tan26° cot26°
=> 1 + 2tan26°(1/tan26°) (sin²θ + cos²θ = 1; tanθ = 1/cotθ)
=> 1 + 2(1)
=> 1 + 2 => 3
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