Question

If cos(40°+x) = sin 30°. Find x.​

Answer 1

Answer:

we can write sin 30degree as sin ( 90 - 60 ) degree = cos 60 degree

now you can write it as cos ( 40 +x ) = cos 60 = 1/2

so finally, on comparing

40 + x = 1/2

x=1/2- 40

x= -79/2

Answer 2

Answer:

20

Step-by-step explanation:

1. RHS equals to sin 30 equals to 1/2 we know that cos 60 quals to sin 30 then 40 + X is equals to 60 x is equals to 20