Question

In triangle ABC angle B =90 degree, AC = 12 and BC = 6. Find measure angle A ?

Answer 1

Answer:

Additionalknowledge

Knowledge about Quadratic equations -

★ Sum of zeros of any quadratic equation is given by ➝ α+β = -b/a

★ Product of zeros of any quadratic equation is given by ➝ αβ = c/a

★ A quadratic equation have 2 roots

★ ax² + bx + c = 0 is the general form of quadratic equation

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Answer 2

Answer:

60 degree

Step-by-step explanation:

 A+B+C=180 DEGREE

A+90+C=180degree

A+C=90 degree

bc+6²=12²

BC²=108

√108=6√3

sinA=6√3/12

sinA=√3/2 and sin60 degree=3/2

so angle A=60 DEGREE

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