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Range of Trigonometric Ratios from 0 to 90 Degrees

Question 4 v ...

Question

Question 4 (v)
State whether the following are true or false. Justify your answer.
(v) cot A is not defined for $A = 0^{\circ}$ .

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Solution

(v) True.
cot A = $\frac{c o s A}{s i n A}$
cot $0^{\circ}$ = $\frac{c o s 0^{\circ}}{s i n 0^{\circ}}$ = $\frac{1}{0}$ = undefined.

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Range of Trigonometric Ratios from 0 to 90 Degrees

Standard X Mathematics

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