Question

Which expression is not equal to 1?

Answer 1

Hopes this helps if it is wrong I am so sorry:

Answer: sin 0 cos 0

Answer 2

sin θ cos C

Step-by-step explanation:

Suppose,  θ=30°

Suppose,

     sin θ cos θ=1

 ⇒sin30°cos30°=1

 ⇒$\frac{1}{2}$×$\frac{\sqrt{3\\} }{2}$=1

 ⇒$\frac{\sqrt{3} }{4}$≠1