View Compilation Error

124170_0_21763.cpp: In function `int main()':
124170_0_21763.cpp:52: error: `atan' undeclared (first use this function)
124170_0_21763.cpp:52: error: (Each undeclared identifier is reported only once for each function it appears in.)
124170_0_21763.cpp:53: error: `pow' undeclared (first use this function)
124170_0_21763.cpp:53: error: `acos' undeclared (first use this function)
124170_0_21763.cpp:55: error: `sin' undeclared (first use this function)
124170_0_21763.cpp:55: error: `cos' undeclared (first use this function)
124170_0_21763.cpp: At global scope:
124170_0_21763.cpp:68: error: expected declaration before '}' token