Question

sin 47 cos 43 + cos 47 sin 43 = ? (a) sin 4 (b) cos 4 (c) 1 (d) 0

Answer 1

Given : sin 47 cos 43 + cos 47 sin 43

To Find : Find its Value ?

Solution :

This Equation is in the form of Sin(A+B) ,

Formula : Sin(A+B) = Sin A Cos B + Cos A Sin B

Here, A = 47° and B = 43°


Substitute these value in Given Equation!

sin 47 cos 43 + cos 47 sin 43

Sin(47 + 43 )

Sin(90°)

1


Hence, Value of sin 47 cos 43 + cos 47 sin 43 is 1.

Answer 2

Answer:

this answer is 1 ; sin(47+43)= sin90=1