Question

You should be able to find this

without a calculator.
sin cos
(co
1
√√3
2
?]
[ ]

Answer 1

1/2

Explanation:

sin 30º=-√3/2, 1/2 or π/6

cos=√3/2

sin= 1/2

Answer 2

`(1)/(2)`

Explanation:

sin(
`cos^(-1)`
`(√(3) )/(2)` )

using the sides of the 30- 60- 90 triangle

with legs 1,
`√(3)` and hypotenuse 2 , then

`cos^(-1)`
`(√(3) )/(2)` = 30° and

sin30° =
`(1)/(2)`