Find the value of cos 2 theta if theta is in the first quadrant and tan theta =15/4

Step-by-step explanation:

Given that:

Also, is in first quadrant.

To find:

Solution:

Let us have a look at the cosine of twice the angle in terms of tangent of the angle.

Suppose, we are given the value of , then the formula can be written as:

In terms of , we can re-write the formula as:

is in first quadrant, but can be in the second quadrant therefore, we have a negative value of our answer i.e. .

Therefore, the answer is:

518,400

step-by-step explanation:

the area is multiplying all the given measurements together.

40 * 18 * 30 * 24 = 518,400

problem:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

f(5/2) = 10/3

i hope this !