Why the cosine of an angle of 90 degree is equal to zero? By definition we know that: cos α=adjacenthypotenuse.cos α=adjacenthypotenuse. If we want to apply the definition to the situation in the image below: we have that: cos 90°=?h.cos 90°=?h. How can I say that it ...
If cos O/ = 1/(sqrt2) , then find the value of 4 + cot O/ . 01:14 Is it correct to say that sin O/ = cos (90 - O/)? why? 03:01 Find the value of tan 2A if cos 3A = sin 45^o . 02:21 In a right triangle ABC, right angled at C in which AB = 13cm, BC =...
Why is cos(π2−θ)=cosθ a conditional equation? Conditional Equation:A conditional equation is a type of equation that is not always true. Conditional equations will only be true for certain values of x and it will be outright false for others. The way to evaluate conditional...
from Chapter 21/ Lesson 5 13K Learn the convergence and divergence tests for an infinite series. See how to use comparison tests to determine if a series is convergent or divergent with examples. Related to this Question Explore our homework questions and answers library ...
According to [29] the incremental change in free energy of adsorption at the water/air interface per one CF2 group is about − 5.1 kJ/mol as compared to − 2.6 kJ/mol for one CH2 group. The bulk aggregation properties of fluorosurfactants are considered to be approximately equal to ...
... This is because those points< every 180 degrees starting at 90, are where the cosine function is equal to 0. Conversely an has an identity: tanθ=y/x=sinθ/cosθ. What are the asymptotes of tangent? The asymptotes for the graph of the tangent function are vertical lines that ...
Sexual selection, including mate choice and intrasexual competition, is responsible for the evolution of some of the most elaborated and sexually dimorphic traits in animals. Although there is sexual dimorphism in the shape of human faces, it is not clear whether this is similarly due to mate ch...
The PBF is higher than 30%, with is a significant reduction of the lean mass, equal to at least 1.5 kg (FFM kg), particularly in the lower limbs muscle mass [30]. The effects of the body composition on the Resting Metabolic Rate, assessed by indirect calorimetry, result in a reduction...
因为cos(α-90)=cos(90-α) 济正堂 白丁 1 cos(α)=cos(-α)所以cos(-α+90)=cos(α-90) sinα=cos(α-90)=cos(90-α) 117.136.23.* 快试试吧,可以对自己使用挽尊卡咯~ ◆ ◆ 一群低能 121.235.21.* 快试试吧,可以对自己使用挽尊卡咯~ ◆ ◆ 楼主上大学很难.这种高一就会的...
Why is -8^2 equal to -64? What is 1,263 minus 769? What is 10 minus 4? What is 5 and 1/4 minus 2 and 3/8? Why is \cos(\pi)=-1? Why is \sec x \neq \cos^{-1} x? does (4x^3y^4)'=d(4x^3y^4)/dx ? and why does d(4x^3y^4)=(12x^2y^4)dx+(16x^3y^3...