Learn Sine Rule

Let us study about sine rule in Trigonometry,

Introduction :

An equation containing the trigonometrical functions of an unknown quantity is termed as a trigonometrical equation, which holds for some values (and not for all values) of the quantities involved.
Co-terminal Angles

The angles (2p + A), (4p + A)......have the same initial and terminal arm as the angle A and so these angles are called co-terminal angles. For all such angles, the value of any trigonometric ratio is the same. Thus, all co-terminal angles are trigonometrically equivalent.

Theorem 1
General solution of sin q = k.

Theorem 2
General solution of cos q = k.

Theorem 3
General solution of tan q = k.

Theorem 4
General solution of acosq + bsinq = c.

I hope the above explanation helped you, now let me explain Cos.