Question

cos(x+(Pi/2)= -sinx

Answer 1

Would you please include the instructions with your postings. I'd like to help, but do not want to have to guess at what it is that you're supposed to do.

Answer 2

verify the following identities

Answer 3

I have to solve the question algebraically.

Answer 4

Lovely: Mind explaining in your own words what "verify" means here?

Answer 5

get these two sides to equal eachother

Answer 6

you can use the "addition angle" formula to get it if you like

Answer 7

Demonstrate that the two sides are equal.

How would you approach simplification of cos(x+(Pi/2))? Hint: see Satellite's advice.

Answer 8

\[\cos(a+b)=\cos(a)\cos(b)-\sin(a)\sin(b)\]
\[\cos(x+\frac{\pi}{2})=\cos(x)\cos(\frac{\pi}{2})-\sin(x)\sin(\frac{\pi}{2})\]

Answer 9

Hints: cos pi/2 = 0; sin pi/2 = 1.

Answer 10

the numbers \(\cos(\frac{\pi}{2})\) and \(\sin(\frac{\pi}{2})\) are well known

Answer 11

I Honestly suck at math, I appreciate the hints, i just am not sure how to use the equation.

Answer 12

Satellite has given you precisely the addition formula you need to calculate

cos (x + pi/2), and I've provided you with the values of cos pi/2 and sin pi/2.

Please look at these, and try your best to come up with a plan for evaluating

cos (x + pi/2).

You'll become better at math as y ou practice it. i wish you wouldn't say unkind things about yourself or your math abilities. Doing so doesn't help you and isn't funny.

Answer 13

Maddi? @lovelymaddi ?