Question

Evaluate using trigonometric identity: 3cosec²A+9sec²A-3cot²A-9tan²A+sin²A+cos²A​

Answer 1

Answer:

The cotangent of x is defined to be the cosine of x divided by the sine of x: cot x = cos x sin x . The secant of x is 1 divided by the cosine of x: sec x = 1 cos x , and the cosecant of x is defined to be 1 divided by the sine of x: csc x = 1 sin x .