Question

14. If cot A = root3, then sec² A - cos² A is equal to ....

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Answer 1

Answer:

7/12

Step-by-step explanation:

cotA = root3 --> which means that A= 30, as cot30 = root3.

A = 30 degrees.

So we have to do:

sec² 30 - cos² 30 = (2/root3)^2 - (root3/2)^2 = (4/3) - (3/4) = 16-9 /12 = 7/12