sin 36°\cos64°- sin 54°/cos36°
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3
Answer:
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=0
Step-by-step explanation:
cos36
∘
cos54
∘
−sin36
∘
sin54
∘
=0
cos(90
∘
−54
∘
)cos(90
∘
−36
∘
)−sin36
∘
sin54
∘
=sin54
∘
sin36
∘
−sin36
∘
sin54
∘
=sin36
∘
sin54
∘
−sin36
∘
sin54
∘
=0
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1
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