If sin 20 degree=a and cos20 degree=b then which of the following represents the correct value of sin 70 degree in terms of a and/or b?
1) a+b
2) a
3) b
4) a-b
+3
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Home » Mathematics » If sin 20 degree=a and cos20 degree=b then which of the following represents the correct value of sin 70 degree in terms of a and/or b? 1) a+b 2) a 3) b 4) a-b