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Trigonometric Ratios

Question 11 i...

Question

Question 11 (iii)
State whether the following are true or false. Justify your answer.
(iii) cos A is the abbreviation used for the cosecant of angle A.

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Solution

(iii) False.
Abbreviation used for cosecant of angle A is cosec A. cos A is the abbreviation used for cosine of angle A.

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tan A

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sec A = \frac{12}{5}

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cos A

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cot A

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sin θ = \frac{4}{3}

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\sec A = \frac{12}{5}

\sin θ = \frac{4}{3}

State whether the following are true or false. Justify your answer.

(i) The value of tan A is always less than 1.

(ii) sec A =for some value of angle A.

(iii) cos A is the abbreviation used for the cosecant of angle A.

(iv) cot A is the product of cot and A

(v) sin θ =, for some angle θ

θ

θ

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