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If cos2 θ = (sec2 θ - tan2 θ) / (tan2 θ sec2 θ), where 0° < θ < 90°, then the value of tan2 θ + sec2θ.
1 - tan2 450 - A 1 + tan2 450 - A   = কত ? 
1-tan2 450-θ1+tan2 450-θ = কত ?
1 - tan2 π4+x1 + tan2 π4+x এর মান কত?
1-tan2 60°1+tan2 60°+sin2 30° এর মান কত?
1-tan2 30°1+tan2 30° =কত?
1-tan2 30°1 + tan2 30° = কত? 
What is the simplified value of [(tan2 θ – sin2 θ)/tan2 θ sin2 θ]?
limx→0  ex-1tan2 xx3 = কত?
Standing waves are produced by the superposition of two waves: y1 = 0.05 sin(3πt - 2X) and y2 = 0.05 sin(3πt + 2X), where x and y are expressed in metres and t is in seconds. Find the amplitude of a particle at x = 0.5m. (Given cos1 = 0.54; sin1 = 0.84; angle is in radian)