Question

find the value of cos theta, if sin theta= 1/2; 0 degrees greater than or equal to theta < 90 degrees

Answer 1

Explanation:

`\because \sin \theta = (1)/(2) \\ \therefore \sin \theta = \sin 30\degree \\ \\ \huge \red{ \boxed{ \therefore \theta = 30\degree }} \\ \\ \cos \theta = \cos 30\degree \\ \huge \purple{ \boxed{\therefore \cos \theta = ( √(3) )/(2) }} \\`

Answer 2

Explanation:

According to the ratios table, if

sin theta = 1/2

Then theta = 30°

Cos theta = cos 30° =root 3 /2