Question

1. In A ABC, right-angled at B, AB = 24 cm, BC = 7 cm. Determine :
(i) sin A, cos A
(i) sin C, cos C​

Answer 1

Answer:

Given triangle ABC

B=90°,AB=24cm,BC=7cm

• sinA=opposite side to A/ hypotenuse
• AC=?
• AC= √(AB square+BC square) ( by pytogorean relation)
• √(24 square +7 square)
• √(576+49)
• √(625)
• 25
• therefore AC=25cm
• sin A=7/25
• cosA=adjacent side to A/hypotenuse
• cos A=24/25
• sin C= 24/25
• cos C=7/25