Q. 8 The value of the expansion (sin square 38 + sin square 52) is –
(a) 1
(b) o
(c)2
(d) None
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7
Answer:
1
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Explanation is in the picture
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Answered by
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From property of complimentary:-
Sin(52)
=Sin(90-38)
=Cos38
Now,
Sin²38+Sin²52
=Sin²38+Cos²38 [ Sin52=Cos38]
=1
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