1.

Cot square theta minus cosec square theta =-1.... true /false​

Answer»

Answer:

Answer:

1+\frac{COT^{2}\theta}{1+cosec\theta}=cosec\theta1+1+cosecθcot2θ=cosecθ

Step-by-step explanation:

LHS = 1+\frac{cot^{2}\theta}{1+cosec\theta}LHS=1+1+cosecθcot2θ

=1+\frac{cosec^{2}\theta-1}{cosec\theta+1}=1+cosecθ+1cosec2θ−1

/* we know the Trigonometric IDENTITY:

cot²A = cosec²A-1 */

=1+\frac{(cosec\theta+1)(cosec\theta-1)}{(cosec\theta+1)}=1+(cosecθ+1)(cosecθ+1)(cosecθ−1)

/*By algebraic identity:

a²-b² = (a+b)(a-b) */

\begin{lgathered}=1+cosec\theta-1\\=cosec\theta\\=RHS\end{lgathered}=1+cosecθ−1=cosecθ=RHS

1+\frac{cot^{2}\theta}{1+cosec\theta}=cosec\theta1+1+cosecθcot2θ=cosecθ



Discussion

No Comment Found

Related InterviewSolutions