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CBSE Class 11-science Answered

If sin^2x+acosx+a^2>=1+cos x for x belongs to R, a element of left parenthesis negative infinity comma k subscript 1 right parenthesis large union left parenthesis k subscript 2 space end subscript comma infinity right parenthesis find mod k1+mod k2
Asked by aahnik.mohanty | 21 Jun, 2019, 09:08: PM
answered-by-expert Expert Answer
sin squared straight x plus acosx space plus space straight a squared greater or equal than 1 plus cosx straight x space belongs space to space straight R so space sub space straight x equals 0 0 plus straight a space plus space straight a squared greater or equal than 1 plus 1 straight a squared plus straight a minus 2 greater or equal than 0 open parentheses straight a plus 2 close parentheses open parentheses straight a minus 1 close parentheses greater or equal than 0 straight a element of open parentheses negative infinity comma negative 2 close parentheses union open parentheses 1 comma infinity close parentheses open vertical bar negative 2 close vertical bar plus open vertical bar 1 close vertical bar equals 3
Answered by Arun | 25 Jun, 2019, 09:35: AM

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