8. Introduction to Trigonometry
medium

જો $\sin ( A - B )=\frac{1}{2}, \cos ( A + B )=\frac{1}{2}, 0^{\circ} < A + B \leq 90^{\circ}, A > B ,$ તો $A$ અને $B$ શોધો.

Option A
Option B
Option C
Option D

Solution

$\sin ( A – B )=\frac{1}{2},$ હોવાથી, $A – B =30^{\circ}$ ……$(1)$

 અને $\cos ( A + B )=\frac{1}{2},$ હોવાથી $A + B =60^{\circ}$ ……$(2)$

$(1)$ અને $(2),$ નો ઉકેલ શોધતાં,

આપણને $A=45^{\circ}$ અને $B=15^{\circ}$ મળે.

Standard 10
Mathematics

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