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Question

If sin(sin115+cos1x)=1, then x=

A
1
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B
0
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C
45
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D
15
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Solution

The correct option is B 15
Given, sin(sin115+cos1x)=1
sin(sin115+sin11x2)=1
sinsin1151+x2+x1(15)2=1
1x25+x245=11x25=1x245
1x225=1+24x2252x245
1x2=25+24x210x24
x=15

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