2015年10月2日 · Find tan (105) Ans: (1 + sqrt3)/(1 - sqrt3) tan (105) = sin (105)/cos (105). Find sin 105 and cos 105. Apply the trig identity: sin (a + b) = sin a.cos b + sin b.cos ...

You can put this solution on YOUR website! Find the exact value of tan(105°) We use the four facts: 1. 2. 3

2016年9月8日 · tan105˚ = -2 - sqrt(3) tan(105˚)= tan(60˚ + 45˚) Use the sum formula tan(A + B) = (tanA + tanB)/(1 - tanAtanB) tan105˚ = (tan60˚ + tan45˚)/(1- tan60˚tan45 ...

2014年10月24日 · The special triangles, #30:60:90 and 45:45:90#, allow us to evaluate sine and cosine and tangent. We leverage that information to evaluate tan(105).

2018年5月2日 · #"using the "color(blue)"trigonometric identities"# #•color(white)(x)tan(-x)=-tanx# #•color(white)(x)tan(x+y)=(tanx+tany)/(1-tanxtany)#

2015年6月11日 · You can derive the half-angle formula if you don't remember it. #sin^2(x) = (1-cos(2x))/2# Similarly: #sin^2(x/2) = (1-cos(x))/2#

2015年6月12日 · Find value of tan (-105) Use trig identity: tan (a + b) = (tan a + tan b)/(1 - tan a.tan b On the trig unit circle, tan (-105) = - tan (105) = - tan (45 + 60) tan 45 ...

135 - 30 = 105 135 is special because it is 3*45 and 30 special and this difference of special angles results in 105. So we will use this difference and the formula for the tan of a difference: Using 135 for A and 30 for B in this formula we getL The left side simplifies to tan(105).

Question 669252: what is the exact value of Tan(105 degrees) Answer by Alan3354(69443) (Show Source):

Here is an example of using a sum identity: Find #sin15^@#.. If we can find (think of) two angles #A# and #B# whose sum or whose difference is 15, and whose sine and cosine we know.