sin 75 degree + sin 15 degree is equal to how many
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1
sin c + sin d= 2 sin (c+d)/2 . cos (c-d)/2
=2.sin 45.cos 30
=2.1/√2.√3/2=√3/√2
i think you got it
klaus199:
yup thnx i got it
Answered by
0
1
because sin 75+ sin 15
= sin 75+ cos 75
we know that sin + cos = 1
so the answer is 1
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