The six basic trigonometric functions are: 1. Sine, #sintheta# 2. Cosine, #costheta# 3. Tangent, #tantheta# 4. Cotangent, #cott

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 …

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 ...

2015年11月14日 · Trig Table of Special Arcs and unit circle --> sin (7pi)/6 = sin (pi/6 + pi) = - sin pi/6 = - 1/2 cos (7pi)/6 = cos (pi/6 + pi) = - cos pi/6 = -sqrt3/2 tan pi/6 = sin ...

2015年12月11日 · Prove trig expression (sin A + sin A/(cos A))/(1 + cos A) = (sin A.cos A + sin A)/(cos A(1 + cos A)) = = [sin A(1 + cos A))/(cos A(1 + cos A)] = sin A/(cos A) = tan A

2015年9月15日 · sec alpha=1/cos alpha This comes straight from the definition. Secans is defined as inverse of cosine.

"The fundamental trigonometric identities" are the basic identities: •The reciprocal identities •The pythagorean identities

For very small values of x, the functions \\sin(x), x, and \\tan(x) are all approximately equal. This can be found by using the Squeeze Law.

2015年4月15日 · Viewed as a right angled triangle tan(x)=5/12 can be thought of as the ratio of opposite to adjacent sides in a triangle with sides 5, 12 and 13 (where 13 is derived from the Pythagorean Theorem) So sin(x) = 5/13 and cos(x) = 12/13

2015年5月25日 · What is the value of #sin -45^@#? How do you find the trigonometric functions of values that are greater than #360^@#? How do you use the reference angles to find #sin210cos330-tan 135#?