Option A

<em><u>Solution:</u></em>
Given that we have to rewrite with only sin x and cos x
Given is cos 3x

We know that,

Therefore,
---- eqn 1
We know that,


Substituting these values in eqn 1
-------- eqn 2
We know that,

Applying this in above eqn 2, we get



Therefore,

Option A is correct
3000000...........
10^6 =1000000 (3) = 3000000
Answer:
1031.25 =x
Step-by-step explanation:
50/24 = x /495
We can use cross products to solve
50 *495 = 24*x
24750 = 24x
Divide each side by 24
24750/24 =24x/24
1031.25 =x
Answer:
ok what teacher gave you this
Step-by-step explanation:
Replace x with the x value solve to get the y value.
see attached picture for answers.