Question

hepl me out!!! maths chapter trigonometry grade 10th​

Answer 1

We know that ,

sin^2 theta + cos ^2theta = 1 .

→ 1-cos^2 theta = sin^2 theta .

......................(1)

Now , √(1-cos^2 40)/√sin^2t 40= √(sin ^2 40 )/√(sin^2 40) { using eq(1) }

= sin 40 / sin 40= 1 .