If cot θ=78, evaluate: (1+sin θ)(1−sin θ)(1+cos θ)(1−cos θ)

1.	If cot θ=78, evaluate: (1+sin θ)(1−sin θ)(1+cos θ)(1−cos θ)
Answer» If $c o t θ = \frac{7}{8}$ , evaluate: $\frac{(1 + s i n θ) (1 - s i n θ)}{(1 + c o s θ) (1 - c o s θ)}$

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