How many radians are there in 1 degree?

In a triangle ABC, sec A (sin B cos C + cos B sin C) equals:

The value of tan 315° is the same as the value of:

The value of cos (45 + θ) - sin (45° + θ) is:

Simplify $$\frac{\text{cos}\space x}{1-\text{sin}\space x}$$​ using trigonometric identities:

The radian equivalent of 150° is ____________.

Find the general solution of equation $$tanx=\frac{1}{\sqrt3}$$.

Find the value of $$\frac{\sin \left(180^{\circ}+\theta\right) \sec \left(360^{\circ}-\theta\right) \cot \left(90^{\circ}-\theta\right)}{\tan \left(180^{\circ}+\theta\right) \sec (-\theta) \cos \left(90^{\circ}+\theta\right)}$$​.

Which of the following is the correct value of tan 10°.tan 20°.tan 60°.tan 70°.tan 80°?