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How to write cos squared of angle phi ?

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mujee

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hey guys
i have some syntax problem in this statement

d=sqrt((x(1:length(x))-r*sin(phi))^2 + r^2 *cos^2(phi))

it gives me error on cos^2(phi)...can anyone tell me how to write cos squared of angle phi
 

Re: syntax problem

mujee said:
hey guys
i have some syntax problem in this statement

d=sqrt((x(1:length(x))-r*sin(phi))^2 + r^2 *cos^2(phi))

it gives me error on cos^2(phi)...can anyone tell me how to write cos squared of angle phi
Click to expand...

what language is this ?
 

Re: syntax problem

matlab
 

Re: syntax problem

mujee said:
hey guys
i have some syntax problem in this statement

d=sqrt((x(1:length(x))-r*sin(phi))^2 + r^2 *cos^2(phi))

it gives me error on cos^2(phi)...can anyone tell me how to write cos squared of angle phi
Click to expand...

try this :

d=sqrt( ( ( (x*(1:length(x))) - (r*sin(phi)) )^2 ) + ( (r^2) * (cos^2(phi)) ) )
 

    M

    mujee

    Points: 2
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syntax problem

Hi mujee, try replacing cos^2(phi) with cos(phi)^2
 

    M

    mujee

    Points: 2
    Helpful Answer Positive Rating
Re: syntax problem

tried both of the options, still same prob
 

syntax problem

Hi

The right command is cos(phi)^2 or (cos(phih))^2.

your problems may be somewhere else

Sal
 

    M

    mujee

    Points: 2
    Helpful Answer Positive Rating
syntax problem

Can you show us a complete example that demonstrates the problem? We need to see how you've defined the variables. Maybe you need to use an element-wise operator such as cos(x).^2
 

    M

    mujee

    Points: 2
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Re: syntax problem

yeah now i figured out the other problem
i was squaring array with ^2 instead of .^2
thank you guys for your help in correcting my syntax cos(phi)^2 was the correct way of doing it
have hit 'helped me' tab for all of you

Added after 6 minutes:

actually that x was an array...i was using wrong operator for that..i needed to use element wise operation and that i just figured out.
with cos i didnt know how to use squared cos ..thanks echo and sal for helping me out
 

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