Trigonometric Ratios
Trigonometric Ratios
Let us take a right triangle ABC right angled at B as shown
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Here, Note that the position of sides change when you consider angle C in place of A We now define certain ratios involving the sides of a right triangle, and call them trigonometric ratios. The trigonometric ratios of the angle A in right triangle ABC are defined as follows: |
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Illustration: ABC is a right angled triangle.If AB = 3 cm, BC= 4 cm and CA = 5 cm and .
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Solution: In the figure we have a right angled triangle ABC right angled at B and we know that by the definition Side opposite to angle A is BC Hypotenuse is AC as side AC is opposite to angle B which is BC= 4 cm AC = 5 cm |
ABC is a right angled triangle.If AB = 21cm, BC= 20cm and CA=29 cm and | |||
| Right Option : B | |||
| View Explanation | |||
ABC is a right angled triangle.If AB = 21cm, BC= 20cm and CA = 29cm and | |||
| Right Option : D | |||
| View Explanation | |||
If | |||
| Right Option : D | |||
| View Explanation | |||
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