Question

Question 6. In the adjoining figure, AB is a chord of the circle and AOC is its diameter such that ∠ACB = 50°. If AT is tangent to the circle at the point A then ∠BAT is equal to *
1 point
Captionless Image
65°
60°
50°
40°​

Answer 1

Answer:

Number of Elements in Power Set –

As each element has two possibilities (present or absent}, possible subsets are 2×2×2.. n times = 2^n. Therefore, power set contains 2^n elements.

Answer 2

∠TAC=∠TAB+∠BAC=90 [equation 1]
now in triangle ABC ∠ABC=90 [since the triangle is in a semi circle]
∠ABC+∠BCA+∠CAB=180
therefore ∠CAB=180−90−50=40
so from equation 1 we get
∠TAB=90−∠BAC=90−40=50



Ans: 50 degree