# How to obtain 0.84? [Solved!]

**L. Aureli** 18 Dec 2015, 23:03

### My question

In Example 1 on the page, how do you obtain 0.84? Please show calculation for common mortals. Thank you.

### Relevant page

3. Graphs of y = a sin(bx + c) and y = a cos(bx + c)

### What I've done so far

Read other examples, tried substituting

X

In Example 1 on the page, how do you obtain 0.84? Please show calculation for common mortals. Thank you.

Relevant page
<a href="/trigonometric-graphs/3-graphs-sin-cos-phase-shift.php">3. Graphs of <span class="noWrap">y = a sin(bx + c)</span> and <span class="noWrap">y = a cos(bx + c)</span></a>
What I've done so far
Read other examples, tried substituting

## Re: How to obtain 0.84?

**Newton** 19 Dec 2015, 18:33

Hello L. Aureli

The `0.84` comes from substituting `x = 0` into `y = sin(2x + 1)`, that is `y = sin(0+1) = sin 1.`

Using calculator, `sin 1 = 0.84` (you must be in radians.)

Hope that makes sense.

Regards

X

Hello L. Aureli
The `0.84` comes from substituting `x = 0` into `y = sin(2x + 1)`, that is `y = sin(0+1) = sin 1.`
Using calculator, `sin 1 = 0.84` (you must be in radians.)
Hope that makes sense.
Regards

## Re: How to obtain 0.84?

**L. Aureli** 20 Dec 2015, 11:41

Doh - I was in degrees and couldn't get 0.84.

Thanks a lot.

X

Doh - I was in degrees and couldn't get 0.84.
Thanks a lot.

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