What is the value of $ sin^2 21 + sin^2 69 $ ?
Answer & explanation
Correct answer: option 4
sin221° + sin269°
= sin2(90° - 69°) + sin269°
= cos269° + sin269°
= 1
What is the value of $ sin^2 21 + sin^2 69 $ ?
Correct answer: option 4
sin221° + sin269°
= sin2(90° - 69°) + sin269°
= cos269° + sin269°
= 1