Find the value of the following angles:
(i) sin (150) (ii) cos (210)
(iii) sin(-45) (iv) tan (-30)
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4
Answer:
(1) sin150
sin(180-30)
sin30
1/2
(2) sin210
sin(270-60)
sin60
√3/2
(3) sin(-45)
sin(0-45)
it lies in fourth quadrant,so it will negative
-sin45
-1/√2
(4) tan(-30)
tan(0-30)
it lies in fourth quadrant which means it value will be negative.
-tan30
-1/√3
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Answer:
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