Question
If cos²α + cos²β = 2, then the
value of tan⁴α + sin⁸β isSolution
cos²α + cos²β = 2 Put the value of α = β = 0⁰ cos² 0⁰ + cos² 0⁰ = 2 cos0⁰ + cos0⁰ = 2 1² + 1² = 2 2 = 2 ( it satisfies the equation) Now, tan⁴ α + sin⁵ β = tan⁴ 0⁰ + sin⁵0⁰ ⇒ 0 + 0 = 0
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If x = 15, find x5 - 16x4 + 16x3 - 16x2 + 16x - 16 = ?
4, 10, 19, 30, 43, ?
The mean age of 30 students was calculated as 15 years. However, it was later discovered that one student's age was mistakenly entered as 15 years inste...
25, 25.8, 27.4, 29, 33, 37
If a + b + c = 8, a² + b² + c² = 18 and ab + b c+ ca = 12, then what is the value of a³ + b³ +c³ –3abc?
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If x2 = 15x + 1, then find the value of {x3 - (1/x3) }.
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