Question

Cos12°+sin42°= ..........​

Answer 1

Cos12R+sin42R

Cos(12R)+sin(90r-48r)

Cos(12r)+cos(48r)

2cos(30r)cos(-18r)

2×корень3/2×cos(18r)

Корень3×cos(18r)

Answer 2

To calculate the value of cos(12°) + sin(42°), you can use a scientific calculator or trigonometric identities. Let's break it down step by step:

1. Calculate cos(12°) and sin(42°):

   • cos(12°) ≈ 0.978
   • sin(42°) ≈ 0.669

2. Add the two values:

   • 0.978 + 0.669 ≈ 1.647

So, cos(12°) + sin(42°) ≈ 1.647.