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10 questions from this quiz
Trig values of 2α2α2α using values of ααα
2sinαcosα2 \sin α \cos α2sinαcosα
cos2α−sin2α\cos^2 α - \sin^2 αcos2α−sin2α
1−2sin2α1 - 2 \sin^2 α1−2sin2α
From compound angle formulae with α=βα = βα=β
0.8660.8660.866
Three
θ=90°+k×180°θ = 90° + k × 180°θ=90°+k×180°, k∈Zk ∈ ℤk∈Z
Pythagoras theorem
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