Why does tan equal to sin/cos? - Socratic
2015年4月15日 · The best answer to this question depends on the definitions you're using for the trigonometric functions: Unit circle: t correspond to point (x,y) on the circle x^2+y^2 =1 Define: sint = y, , cos t = x, , tant = y/x The result is immediate. Point (x,y) on the terminal side of t and r=sqrt(x^2+y^2) sint = y/r, , cos t = x/r, , tant = y/x sint/cost = (y/r)/(x/r)= (y/r)*(r/x) = y/x = tan t …
How do you simplify #tan(x) cos(x)#? - Socratic
2015年9月22日 · Use the fact that tan(x) = sin(x)/cos(x) tanxcons = sinx/cosx *cosx/1 = sinx
How do you simplify #tan(cos^(-1)x)#? - Socratic
2016年4月27日 · Let a=cos^(-1)x. Then x= cos a and tan a=sina/cos a=+-(sqrt(1-x^2)/x) Answer:+-(sqrt(1-x^2)/x) .
Fundamental Identities - Trigonometry - Socratic
"The fundamental trigonometric identities" are the basic identities: •The reciprocal identities •The pythagorean identities
Proving Identities - Trigonometry - Socratic
The functions sine, cosine and tangent of an angle are sometimes referred to as the primary or basic trigonometric functions.
Basic Trigonometric Functions - Trigonometry - Socratic
The six basic trigonometric functions are: 1. Sine, #sintheta# 2. Cosine, #costheta# 3. Tangent, #tantheta# 4. Cotangent, #cott
Double Angle Identities - Trigonometry - Socratic
How do you find sin 2x, cos 2x, and tan 2x from the given information: #tan x=-6/5# and x is in the second quadrant? How do you use double angle formulas to calculate cos 2x and sin 2x without finding x if #cos x = 3/5# and x is in the first quadrant?
Express tan θ in terms of cos θ? - Socratic
2018年3月11日 · Express tan θ in terms of cos θ? Trigonometry. 1 Answer Jim G. Mar 11, 2018 ...
Write tan(cos^-1(- x/5)) as an algebraic Expression in terms of X.
2017年4月5日 · If #sec theta = 4#, how do you use the reciprocal identity to find #cos theta#? How do you find the domain and range of sine, cosine, and tangent? What quadrant does #cot 325^@# lie in and what is the sign?
What is #tan(45)#, #sin(45)# and #cos(45)#? - Socratic
2017年11月17日 · tan(45^@)=1 sin(45^@)=sqrt2/2 cos(45^@)=sqrt2/2 45^@ is a special angle, along with 30^@, 60^@, 90^@, 180^@, 270^@, 360^@. tan(45^@)=1 sin(45^@)=sqrt2/2 cos(45 ...