Math, asked by subhamma1234, 3 months ago

Express the trigonometric ratios cosA, csc A , secA in terms of tanA. ​

Answers

Answered by abdulhadicoder
0

Answer:

Step-by-step explanation:

⇒ cos A   = \frac{1}{sec A}  = 1 / √(1 + tan²A)         (∵sec²A = 1 + tan²A)

⇒ cosec A = √(1 + cot²A)            

                  = √(1 + 1/tan²A)                    (∵cot²A = 1 / tan²A)

                  = √[(tan²A + 1) / tan²A]

                  = √(tan²A + 1) / √(tan²A)

                  = √(tan²A + 1) / tan A

⇒ sec A  = √(1 + tan²A)               (∵sec²A = 1 + tan²A)

If not understood, take help of the worked out picture below

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