Formula for Sine

In this blog we are going to learn about formula for sin and sin rule formula.
Definition for sine:Based on tringle.< /b>

See the given any angle q (0 £ q £ 90°), we can find the sine of that angle by constructing a right triangle with one vertex of angle q. The sine is equal to side opposite to q( length), divided by the length of the triangle's hypotenuse. In this way, we can find the sine of any q in the range 0 £ q £ 90°.

Formula to do Sine.

• Sin(x+y) = sin(x) cos(y) + cos(x) sin(y).
• Sin(x-y) = sin(x) cos(y) – cos(x) sin(y).
• Sin (2x) = 2sin(x) cos(x).

These are the formula for sine.Now get some knowledge on sine rule.

A sine rule is a formula which is used to findout the unknown in a non right triangle. Sine rule is about an equation in which relating to side length and angle of a triangle. Sine rule is also known as Law of sines.

Here is the sine rule formula.

Sin(A)/a= sin(B)/b=sin(C)/c

This is the sin rule formula .Next time we will learn some solved problem! s on for mula for sine and sine rule based problems.

Learn Sine Rule