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Some Applications of Trigonometry
Question
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In ΔABC, right angled at B. AB = 24 cm, BC = 7 cm. Determine:
(i) sin A cos A,
(ii) sin C, cos C.

Answer

Let AB = 24 cm
BC = 7cm Using Pythagoras theorem, we have
AC2 = AB2 + BC2
= (24 cm)2+ (7 cm)2
= 576 cm2 + 49 cm2
= 625 cm2
So, AC = 25 cm

Now,

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