This is the basic and conceptual question from trigonometry, topic – trigonometric identities in which we have been asked to find the value of (sin²θ+1/(1+tan²θ)

Kindly give me a detailed solution of this question

RS Aggarwal, Class 10, chapter 13C, question no 5

sin²θ+1/(1+tan²θ)

=sin²θ+1/sec²θ

=sin²θ+cos²θ

=1