帮我把这个数学表示式写成C++表达式

来源：百度知道 编辑：UC知道 时间：2024/06/18 01:46:04
y=lg(x2+3)+π/2*cos40

x2---是x的平方
40--是40度
我打不出来，汗
y=lg(x2+3)+(π/2)*cos40

pi=3.1415926535897932384626;
y=log10(x*x+3)+pi/2*cos(pi*2/9);

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
float x,y;
const float pi=3.1415926;
cout<<"input x"<<endl;
cin>>x;
y=lg(2*2+3)+(pi/2)*cos(pi*40/180);
cout<<"y="<<y<<endl;
}

#include<iostream.h>
#include<math.h>
void main()
{
float x,y;
double pi=3.1415926;
cout<<"input x"<<endl;
cin>>x;
y=log(x*x+3)+(pi/2)*cos(pi*2/9);
cout<<"y="<<y<<endl;
}

#include<math.h>
#define PI 3.1415926535
....
....
y=log10(x*x+3)+PI/2*cos(40/180*PI);
.....
.....