Someone help me pliisss

The prove of the given identity is shown below:

Step-by-step explanation:

It seems that the question involves the proving of a trigonometric identity.

Therefore, we are going to work independently on each side of the equal sign.

We start by considering since the angle alpha is the same as the addition of two halves of it. Then we apply the identity for the cosine of an addition of angles:

and now we use the Pythagorean identity to replace the cosine square expression:

in the difference of square trig functions we had arrived to:

We have arrived at the exact same expression the original identity shown on the righthand side of the equal sign, so we have proved the identity.

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

hope this : )