Question

write the value of cot square theta -1/sin square theta

Answer 1

HEY Buddy.....!! here is ur answer

we have to find the value of : cot²A–1/sin²A

=> cot²A–cosec²A

{ As we know that : sinA = 1/cosec A }

=> –1

{ As we know that : cosec²A = 1 + cot²A

=> cot²A–cosec²A = –1 }

I hope it will be helpful for you...!!

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Answer 2

AN IDENTITY IS AN EQUALITY that is true for any value of the variable. (An equation is an equality that is true only for certain values of the variable.)

In algebra, for example, we have this identity:

(x + 5)(x − 5) = x2 − 25.

The significance of an identity is that, in calculation, we may replace either member with the other.  We use an identity to give an expression a more convenient form.  In calculus and all its applications, the trigonometric identities are of central importance.

On this page we will present the main identities.  The student will have no better way of practicing algebra than by proving them.  Links to the proofs are below.

Reciprocal identities

sin θ =     1  
csc θ       csc θ =     1  
sin θ cos θ =     1  
sec θ       sec θ =     1  
cos θ tan θ =     1  
cot θ       cot θ =     1  
tan θ

Hope it helps you friend
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