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#1 2015-03-04 02:26:33

Maou-Sama
Member
Registered: 2015-03-03
Posts: 9

trigo problem

how to solve this please help.

Last edited by Maou-Sama (2015-03-04 02:27:49)

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#2 2015-03-04 04:55:44

bob bundy
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Registered: 2010-06-20
Posts: 8,206

Re: trigo problem

hi Maou-Sama

You can use trig on triangle OAC to get OA and AC.  Leave your answers with root 3 when it comes up rather than an approximate decimal.

From that you can get the area of the triangle and the rectangle.

Then the sector by pi/3 times r squared / 2 and subtract.

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#3 2015-03-04 05:12:14

Maou-Sama
Member
Registered: 2015-03-03
Posts: 9

Re: trigo problem

thanks bob but when do you know which to pick
eg: cos30=√3/2 while tan 30=1/√3

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#4 2015-03-06 21:23:44

bob bundy
Administrator
Registered: 2010-06-20
Posts: 8,206

Re: trigo problem

Looks like you'll have to use cos and sin in this problem.

Bob

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei

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#5 2015-12-18 02:00:27

Relentless
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Registered: 2015-12-15
Posts: 624

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