Calculation question

[donkeyotay]

On the Launchbar web site are various screenshots, one of which shows the following calculation:

log(sin(pi/2)/sqrt(3))

With the answer

-0.238560627

In a moment of boredom I tried to replicate this and failed miserably. When I calculate using LB I get the following answer

-1.800617788

However, if I do the calculation in the new Wolfram Alpha engine I get the following answer

-0.549306144334054845697622618461262852323745278911374725867

Can someone tell me which one is correct & why there is a discrepancy between the web site & my LB or between Wolfram Alpha & my LB?
Best wishes
Simon

[norbert]

On the Launchbar web site are various screenshots, one of which shows the following calculation:

log(sin(pi/2)/sqrt(3))

With the answer

-0.238560627

You get -0.238560627 when the trigonometry mode is set to "Radian" (see LaunchBar Preferences > Calculator).

In a moment of boredom I tried to replicate this and failed miserably. When I calculate using LB I get the following answer

-1.800617788

You get -1.800617788 when the trigonometry mode is set to "Degree".

However, if I do the calculation in the new Wolfram Alpha engine I get the following answer

-0.549306144334054845697622618461262852323745278911374725867

Wolfram Alpha considers log() to be the natural logarithm. In LaunchBar this is the common logarithm (base 10), whereas ln() denotes the natural logarithm.

[donkeyotay]

Thank you for such a masterly reply.
Best wishes
Simon