help me please?

Question

prove syn(squared)+cos(squared)=1

Answer 1

This is true by definition. If you study sins and cosines you will know that it is based on a circle with a radius of 1. The pythagorean theorum says that a^2+ b^2 = c^2 in a right triangle.

Answer 2

If you look at a unit circle you will see that any point on that unit circle will have coordinates of (cos(theta),sin(theta)). Since the coordinates are (cos(theta),sin(theta)), a triangle can be drawn with legs of cos(theta) and sin(theta) and with a hypotenuse of the radius (which is 1). Since Pythagoreans theorem is a^2+b^2=c^2 (where a and b are the legs and c is the hypotenuse) we can say

cos^2(theta)+sin^2(theta)=1^2

which becomes

cos^2(theta)+sin^2(theta)=1


since the radius of the unit circle is 1.

Answer 3

soory brother or sis i have never learn this type of question in math

Answer 4

sin=opp/hyp
cos=adj/hyp

sin^2=opp^2/hyp^2
cos^2=adj^2/hyp^2

sin^2+cos^2=opp^2/hyp^2 +adj^2/hyp^2=(opp^2+adj^2)/hyp^2

by pythagorean theorem, (opp^2+adj^2)=hyp^2 (a^2+b^2=c^2)

so you have hyp^2/hyp^2 which =1

Answer 5

awww....man...its soo long ive tooken math....