0_0_32350807_31508.cpp: In function 'int main()': 0_0_32350807_31508.cpp:16:18: error: 'sin' was not declared in this scope x=r*sin(a); ^ 0_0_32350807_31508.cpp:17:18: error: 'cos' was not declared in this scope y=r*cos(a); ^