Question

let us show that sin²21° + sin²69°=1 ​

Answer 1

Holå mate❤

ANSWER✍

Sin69°= Sin (90°–21°) = cos21°

=>sin²21° + sin²69° = sin²21°+ cos²21° =1 [sin²∅ + cos²∅ = 1]

✌hope it's help you✌

Answer 2

Solution

=)sin^2 69° +sin^2 21°

=)sin^2(90°-21°)+ sin^2 21°

=)cos^2 21° +sin^2 21°=1

hope it helps