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The tangent of an angle, denoted as tan, is a trigonometric function defined as the ratio of the opposite side to the adjacent side in a right triangle. For tan(4), where 4 is in radians, it represents the tangent of 4 radians. The numerical value can be calculated using a calculator or trigonometric tables, yielding approximately -1.1578.
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Can someone verify that sec4 theta-sec2 theta equals tan4 theta plus tan2 theta?
sec4(Θ) - sec2(Θ) = tan4(Θ) + tan2(Θ)Factor each side: sec2(Θ) [sec2(Θ) - 1] = tan2(Θ) [tan2(Θ) + 1]Use the identitiy: 1 + tan2(Θ) = sec2(Θ)We can also write it as: tan2(Θ) = sec2(Θ) - 1Substitute the first form of the identity in the right side: sec2(Θ) [sec2(Θ) - 1] = tan2(Θ) sec2(Θ)Substitute the second form of the identity in the left side: sec2(Θ) tan2(Θ) = tan2(Θ) sec2(Θ)Is that close enough for you ?Is it worth a trust point ?
How do you enter the code for gems?
The code for gems could be added in many ways many people use the following way: lets suppose the stone is tanzanite and it weighs 5.5 ct and is 4*6*3.5 and the date is 24-06-2009. so we will enter tan5.5-24-06 tan4-6-3.5-5.5 DSC10062tan5.5 or 5.5-4-6-3.5tz
