The value of sin 35° cos 55°+ cos 35° sin 55° is:
Answer & explanation
Correct answer: option 4
We know,
sinA = cosB iff A + B = 90 °
ATQ,
sin 35° cos 55°+ cos 35° sin 55°
= sin 35° sin35°+ cos 35° cos35°
= sin²35° + cos²35°
{ we know, sin²A + cos²A = 1 }
= 1