Any math expert please help! ! !

Step-by-step explanation:

Hello,

as cosx+sinx=k we can write that

and we know that

so

which is the answer to the question 2

Now, let s estimate

so

We use the previous result to write

and we know that

so

this is the answer to the first question

finally, let s estimate

so

and this is the answer to the last question

do not hesitate if you need further explanation

hope this helps

the answer is c just got it on ed

step-by-step explanation:

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3