- [Easy]The identity 1 + tan²θ equals...
- [Easy]The formula for sin(A + B) is...
- [Easy]The range of sin⁻¹(x) is...
- [Easy]The value of cos 60° is...
- [Easy]The value of sin 30° is...
- [Easy]In a triangle ABC, the sine rule is...
- [Medium]The formula cos 2θ can be written as...
- [Easy]The formula for cos(A + B) is...
- [Easy]The identity sin²θ + cos²θ equals...
- [Easy]The general solution of cos θ = 1 is...