QUESTION
What is the value of
1. sin 150°
2. sin 135°
Answers
Answered by
4
sin150° = sin(90+60)
cos60 = 1/2
simlarly
sin(135) = sin(90+45)
cos45 = 1/√2
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Answered by
0
1-Answer:
sin(150∘)=12
Explanation:
sin(150∘)=sin(180∘−30∘)=sin30∘
because sin is positive in the 2nd quadrant, so
sin30∘=12
2--Answer
sin(135)
= sin (90 + 45)
= sin(90)cos(45) + cos(90)sin(45)
= ( 1 x 1/√2) + (0 x 1/√2)
= 1/√2
= (√2)/2
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