The answer is D. Hope this helps.
Step-by-step explanation:
But, as you know that
Then the equation (1) becomes
Multiply Numerator and Denominator by
then,
take cos y as common, then
Here, (1+cos y/cos y + 1) gets cancelled.
Then the remaining answer is cos y.
What you would do in order to make 3 4/12 an improper fraction is multiply 3 x 12...and you will get 36, then you would add 4...and get 40... Then you would keep the bottom number and the anwer for this fraction as an improper fraction is...40/12