32 lines
1.0 KiB
C++
32 lines
1.0 KiB
C++
#include <iostream>
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#include <cmath>
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#ifdef M_PI // defined by all POSIX systems and some non-POSIX ones
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double const pi = M_PI;
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#else
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double const pi = 4*std::atan(1);
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#endif
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double const degree = pi/180;
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int main()
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{
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std::cout << "=== radians ===\n";
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std::cout << "sin(pi/3) = " << std::sin(pi/3) << "\n";
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std::cout << "cos(pi/3) = " << std::cos(pi/3) << "\n";
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std::cout << "tan(pi/3) = " << std::tan(pi/3) << "\n";
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std::cout << "arcsin(1/2) = " << std::asin(0.5) << "\n";
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std::cout << "arccos(1/2) = " << std::acos(0.5) << "\n";
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std::cout << "arctan(1/2) = " << std::atan(0.5) << "\n";
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std::cout << "\n=== degrees ===\n";
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std::cout << "sin(60°) = " << std::sin(60*degree) << "\n";
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std::cout << "cos(60°) = " << std::cos(60*degree) << "\n";
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std::cout << "tan(60°) = " << std::tan(60*degree) << "\n";
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std::cout << "arcsin(1/2) = " << std::asin(0.5)/degree << "°\n";
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std::cout << "arccos(1/2) = " << std::acos(0.5)/degree << "°\n";
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std::cout << "arctan(1/2) = " << std::atan(0.5)/degree << "°\n";
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return 0;
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}
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