Posted by **Sam** on Tuesday, October 29, 2013 at 6:24pm.

Below is the graph of y = a cos(bx+c)+d, where a, b, and c are positive, and c is as small as possible. Find a + b + c + d.

prntscr. com/20mkyo

The link is to a screenshot of the graph. (without spaces)

I'm unsure of how to solve - I tried it and got y = 2 cos (2/3x + 5pi/2) + 1 but it is wrong....help would be appreciated, thanks.

- Graphing - Trigonometry -
**Steve**, Tuesday, October 29, 2013 at 8:06pm
max-min = 4, so a=2

center of wave is at y=1, so d=1

period is 3pi, so b=2/3

wave is shifted right by 3pi/2, so we have 2/3 (x-3pi/2) = 2/3 x - pi

y = 2cos(2/3 x - pi) + 1

- Graphing - Trigonometry -
**Sam**, Wednesday, October 30, 2013 at 9:32am
thanks a lot man :)

- Graphing - Trigonometry -
**Sam**, Wednesday, October 30, 2013 at 9:33am
thanks a lot steve you're awesome and helping me a lot on these problems I've tried working on them and when I couldn't you helped me so thanks

## Answer this Question

## Related Questions

- Trigonometry - Directions: Use a graphing utility to approximate the solutions ...
- math (graphing) - I need to graph "y = -2x+5" and "y = 4/5x-3"... I don't think ...
- Trigonometry - I'm having a lot of trouble with graphing trig functions. Can ...
- trigonometry - I need help finding the key points for the graph y=1/3 cos x and ...
- trignometry - use degree measure for your answers. use a calculator and round ...
- Math - Graph and identify the kind of conic the graph represents: a. x(t)=3 cos ...
- Triggggggg ;( - Use your graphing calculator to graph y = cos^−1(x)in ...
- Math - Calculus - The identity below is significant because it relates 3 ...
- Math - Hello! Can you check my answers for these questions? Thank you in advance...
- Math - Hello! Can you check my answers for these 4 worksheet questions? Thank ...