If x=aCosθCosΦ, y = aCosθSinΦ and z= aSinθ, then the value of x2+ y2 + z2 is
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The value of sec217°-1tan273°-sin17°sec73°
In an isosceles triangle ABC, AB = AC, XY || BC. If ∡A = 30, then ∡BXY =
If xa+b+1=xa-b+a-ba+b, then x is equal to
If a-b=1 and a3-b3 = 61, then the value of ab will be
If p = 99, then the value of p(p2+3p+3) will be
Find the missing number in the series:
219, 211, 204, 198, ?, 189
If θ is positive acute angle and 4sin2θ = 3, then the value of tan θ - cot θ/2 is
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