Answer:

Step-by-step explanation:
we would like to solve the following equation:

notice that, the fraction can be reduced therefore reduce fraction:


by trigonometric value table we obtain:

get rid of sin:

and we are done!
Answer: OPTION D
Step-by-step explanation:
You need to remember this property:

And remember that:
Then, the first step is rewrite the expression:

Now, to find the corresponding equivalent expression, you need to simplify the expression.
Therefore, the equivalent expression is the following:

Finally, you can observe that this matches with the option D.
I would do it in Buhh I'm working so add all of them(16,18,20) together 6 times then add another 16 and 18 and you will get your answer.
3/4
The easiest way to solve this is to test the numbers one by one. 2/3 is not the answer because 2/3 times 3/2 is 1, not 9/8. It is 3/4 because 3/2 times 3/4 is 9/8, 9/8 times 3/4 is 27/32, and so forth.
First we need to do 12 ÷ 4 to see how many times that goes in. You get 3. Then you do