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Sin/Cos
Tan
Cos/sin
Cot
1/csc
Sin
1/sec
Cos
1/cot
1/sin
Csc
1/cos
Sec
1/tan
Sin² + Cos²
1
1 + tan²
Sec²
1 + cot²
Csc²
a² - b²
(a-b)(a+b)
Cos(-0)
Cos(0)
Sec(-0)
Sec(0)
Sin(-0)
-Sin(0)