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What is the answer for question 1) ? http://postimg.org/image/jjjnw5hzr/ It's all...

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lkballer24 | Student, Grade 11 | Valedictorian

Posted August 19, 2013 at 1:46 AM via web

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What is the answer for question 1) ?

http://postimg.org/image/jjjnw5hzr/

It's all only one question.

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aruv | High School Teacher | Valedictorian

Posted August 19, 2013 at 3:11 AM (Answer #1)

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`sin^2(x)=1/2`

`sin(x)=+-1/sqrt(2)`

`sin(x)=+-sin(45^0)`

`x=45^0 and 225^0`

2. `cos^2(x)=-cos(x)`

`cos^2(x)+cos(x)=0`

`cos(x)(cos(x)+1)=0`

`either`

`cos(x)=0`

`x=0^0 and 360^0`

`or`

`cos(x)+1=0`

`cos(x)=-1`

`x=180^0`

Please for other two parts repost problems. eNotes rule does not permit us to answer more than one.

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