Question
If S is the total surface area of a cube and V is
its volume, then which one of the following is correct ? (a) `v^3=216s^2` ` (b) `s^2 = 216v^2` (c) `s^3 = 6v^2` (d) None of these` `Solution
Surface area of cube (s) = 6a 2 Volume of cube (v) = a 3 S 3 = 216a 2 V 2 =a 6 [if gte vml 1]>
∆ PQR is right-angled at Q. If ∠R = 60º, then find the value of cosec P.
tan 1˚ × tan 2˚× …………………….tan 88˚ × tan 89˚ = ?
If 3 tan X + cot X = 2√3, then find the value of 6 tan2 X + 2 cot2 X.
If cos4B = sin(B - 10°), then find the measure of 'B'.
If Sin θ + Cos θ = √2 Cos(90 - θ ), then find the value of Cot θ ?
...cot 13˚
cot 14˚ ...- Find the value of sin²18° + sin²72° + cos²63° + cos²27°.
sin2 12˚ + sin2 14˚ + sin2 16˚ + sin2 18˚ + ……… + sin2 78˚ =?
- Calculate the value of sin120 o + cos180 o + tan225 o .