Question

Sin 60°
Evaluate
Cos 30 degree​

Answer 1

Sin 60°= √3/2

cos 30° = √3/2

Answer 2

W.K.T sin 60 = √3/2

So cos 30 =?

sin and cos are complementary.

60 + 30 = 90

So if θ = 60

W.K.T sin θ = cos (90 - θ)

sin 60 = cos (90 - 60)

√3/2 = cos 30

So cos 30 = √3/2

Of course, we know that from the value table cos 30 is √3/2. But according to your question, it seems as if you want us to find cos 30 from sin 60. Let me tabulate it again:

sin 60 = √3/2

cos 30 = √3/2