Question

Trigonometry

Angle Sum and Difference, Double Angle and Half Angle Formulas
Find the exact value of:
Sin 22* cos 38* + Cos 22* sin 38*

Answer 1

sqrt(3)/2

Explanation:

sinAcosB+cosAsinB = sin(A+B)

sin(22)cos(38)+cos(22)sin(38)

= sin(22+38) = sin(60)

= sqrt(3)/2