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90∘ θ sin270∘+θ cosec180∘+θ/cos θ sin90∘+θ tan360∘ θ is equal to

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Telugu] (cos(180^(@)-A)*cot(90^@+A)*cos(-A))/(tan(180^(@)+A) tan(270^

Let `a=cos 0^@ sin² 270^@ - 2 cos 180^@ tan 45^@b=3 sin 180^@ *sec