CosA cosB + SinA sinB, Sin(A-B), Cos(A+B), Cos(A-B), Sin(A+B), قيمة Tan195 تساوي, 2 - √3, 2 + √3, √3, √3 - 2, قيمة Sin15 تساوي, SinA cosB - CosA SinB, sin(A+B), sin(A-B), cos(A-B), cos(A+B), من متطابقات ضعف الزاوية θsin2 تساوي, 2sinθ cosθ, sinθ-cosθ, sinθ, cosθ+sinθ

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