Question

From the following figure,
find the values of :
i) sin A
ii) sec A
iii) cos^2 A + sin^2 A​

Answer 1

Answer:

I) sin A = p/h = BC/AC =a/AC

II) sec A = h/b = AC/AB = AC/a

III) cos² A + sin² A = (AB/AC)² + (BC/AC)² =AB²+BC²/AC² = AC²/AC²=1. (IDENTITY)

Step-by-step explanation:

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