Question

what is rule of sine and cosine

Answer 1

Answer:

The sine rule and cosine rule. Introduction. To solve a triangle is to find the lengths of each of its sides and all its angles. The sine rule is used when we are given either a) two angles and one side, or b) two sides and a non-included angle.

Answer 2

SINE RULE :-

a/sinA = b/sinB = c/sinC = 2R

COSINE RULE :-

${a}^{2} = {b}^{2} + {c}^{2} - 2bc \cos \alpha \\ { b}^{2} = {c}^{2} + {a}^{2} - 2ac \cos \beta \\ {c}^{2} = {b}^{2} + {a}^{2} - 2ab \cos \: \gamma$

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