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Question
Choose the correct alternative:
If cos 28° + sin 28° = k3, then cos 17° is equal to
Options
`"k"^3/sqrt(2)`
`- "k"^3/sqrt(2)`
` +- "k"^3/sqrt(2)`
`- "k"^3/sqrt(3)`
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Solution
`"k"^3/sqrt(2)`
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Choose the correct alternative:
`(sin("A" - "B"))/(cos"A" cos"B") + (sin("B" - "C"))/(cos"B" cos"C") + (sin("C" - "A"))/(cos"C" cos"A")` is
