Sina =&the opposite side/hypotenuse of LTA

Adjacent edge/hypotenuse of cosA =<a

Tana = & Opposite/Adjacent Edge of LTA

I will provide some more information about trigonometric function values:

Representative of special trigonometric function value [30' 60' 45']'

Sinkostan

30' 1/2 root number 3 divided by 2 root number 3 divided by 3

60' root number 3 divided by 2 1/2 root number 3

45' Root number 2 divided by 2 Root number 2 divided by 2 1

Where the value of the complementary angle function is the same, sin+cos =1'in the right triangle of 45 [as can be seen from the table].

As for the problem-solving skills, it is difficult to express them in words. Because these problems involve a wide range, we use similar triangles's knowledge, Pythagorean theorem and the nature of right triangle to solve them. The best way is to consolidate the basic knowledge. Then naturally it is not difficult to solve the problem! I can only tell you that most solutions of trigonometric functions are related to similar triangles's knowledge, Pythagorean theorem and the properties of right triangles. You can consider these before solving the problem, and it should be solved. ........

Finally, I wish you higher and higher math scores! ! ! ! ! !

References:

. yahoo.com/question/？ qid= 1307030206635

Respondent: 1999abcd_zxcvb-