This is what you're looking for if I'm not mistaken
sin²x + cos²x = 1
So:
sin²x = 1 - cos²x
∴ sin²x * cos²x = (1 - cos²x) * cos²x
= cos²x.(1 - cos²x)
(= cos²x - cos⁴x)
<u><em>3×10=30+1=31 is the true meaning and answer for this question.</em></u>
<u><em>Hope you good times!</em></u>
Answer: 2.4
solution: 12/5= 2.4
We have the expression

We can already simplify x because it's both on the numerator and denominator

Now we can simplify 425/25 = 17

Remember that

Then

The final result is