##
**
Sin, cos, tan
**

##
**
Value of sin, cos, tan at different angles
**

##
**
Basic Identities
**

cos
^{
2
}
θ + sin
^{
2
}
θ = 1

1 + tan
^{
2
}
θ = sec
^{
2
}
θ

1 + cot
^{
2
}
θ = cosec
^{
2
}
θ