EAMCET Engineering 2003 Solved Paper

Section: Mathematics

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Question : 158 of 160

Marks: +1, -0

If A+B+C=270∘, then cos‌2‌A+cos‌2‌B+cos‌2‌C is equal to:

4sin‌Asin‌Bsin‌C
4‌cos‌A‌cos‌B‌cos‌C
1−4sin‌Asin‌Bsin‌C
1−4‌cos‌A‌cos‌B‌cos‌C

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