<code><span class="hljs-meta">#<span class="hljs-meta-keyword">include</span> <span class="hljs-meta-string"><stdio.h></span></span>
<span class="hljs-meta">#<span class="hljs-meta-keyword">include</span> <span class="hljs-meta-string"><math.h></span></span>
<span class="hljs-meta">#<span class="hljs-meta-keyword">define</span> PI 3.141592654</span>
<span class="hljs-function"><span class="hljs-keyword">int</span> <span class="hljs-title">main</span><span class="hljs-params">()</span>
</span>{
<span class="hljs-keyword">double</span> arg = <span class="hljs-number">30</span>, result;
<span class="hljs-comment">// Converting to radian</span>
arg = (arg * PI) / <span class="hljs-number">180</span>;
result = <span class="hljs-built_in">cos</span>(arg);
<span class="hljs-built_in">printf</span>(<span class="hljs-string">"cos of %.2lf radian = %.2lf"</span>, arg, result);
<span class="hljs-keyword">return</span> <span class="hljs-number">0</span>;
}</code>
Shathana. S.R. Answered question
Function cos() takes a single argument in radians and returns a value in type double . The value returned by cos() is always in the range: -1 to 1. It is defined in <math. h> header file.
Shathana. S.R. Answered question
The given code is a C program that calculates the cosine of an angle in radians. Here’s a breakdown of the code:
- The program includes the necessary header files:
stdio.hfor input/output operations andmath.hfor mathematical functions. - The constant
PIis defined with an approximate value of 3.141592654. - The
mainfunction is defined with a return type ofintand no parameters. - Inside the
mainfunction:- A variable
argof typedoubleis declared and assigned a value of 30, representing the angle in degrees. - The value of
argis converted to radians by multiplying it withPIand dividing by 180. - The
cosfunction from themathlibrary is used to calculate the cosine ofarg, and the result is stored in theresultvariable. - The
printffunction is used to display the value ofargandresult, formatted with two decimal places. - The
mainfunction returns 0, indicating successful program execution.
- A variable
When you run this program, it will output the cosine of 30 degrees (converted to radians) as follows:
cos of <span class="hljs-number">0.52</span> radian = <span class="hljs-number">0.87</span>
Please note that the cos function from the math library expects the angle to be in radians, so the conversion from degrees to radians is necessary.
Annie Sanjana Answered question