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Answer: 30°
Step-by-step explanation: The base angles of an isosceles triangle are equal, so m∠ACB = 75°.
The sum of the angles of any triangle is 180°.
75° + 75° + m∠BAC = 180°
m∠BAC = 180° - (75° + 75°) = 30°

The triangle is a sum of three non-collinear points. The sum of all the angles of the triangle is equal to 180-degrees.
The value of ∠BAC is equal to 30°
In the given image, the triangle is isosceles, in which two sides and two angles are equal.
Given, in triangle ABC, the measure of ∠ACB = 75°.
Now, we know that:
Sum of all the angles of triangle = 180°.
∠ABC + ∠ACB+ ∠BAC = 180°
75° + 75° + ∠BAC = 180° [angles in isoceles triangle]
∠BAC = 180° - 150°
∠BAC = 30°
Therefore, the value of ∠BAC is equal to 30°
To know more about the isosceles triangle, refer to the following link:
https://brainly.com/question/2456591