PHP vs EXCEL Formula

Hello,

Wondering if someone can help. I am trying to convert an excel formula into a PHP string to calculate the value.

FORMULA:   =-0.91*(SIN(0.79/2))^3  which gives the answer -0.05  which is correct.
PHP:  echo -0.91*(sin(0.79/2))^3;   gives me an answer of 3.

Wondering if anyone can point me in the right direction of what I might be doing wrong.  I have check and SIN is support in php.

Regards
Ben
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Benji_Asked:
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Benji_Connect With a Mentor Author Commented:
You cannot use ^3 and need to use the pow() function.
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