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Find the value of the following : (a) s...

Find the value of the following :
(a) `sin ( - 30^(@))` (b) `cos (-60^(@))` (c ) `tan (- 45^(@))`

A

`(a) ` `-1//2,` (b) `1//2` (c ) `-1``

B

`(a)` `1//2,` (b) `-1//2` (c ) `-1``

C

`(a)` `-1//2,` (b) `1//2` (c ) `1``

D

`(a)` `-1//2,` (b) `-1//2` (c ) `-1``

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The correct Answer is:
A
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