Page 43 - E booklet prep 3 bader 2025 b_Neat

The main trigonometrical ratios of some angles

We can summarize The main trigonometrical ratios of the angles ??????, ?????? ,
?????? in the following table

Angle ?????? ?????? ??????
Ratio ?? ??
?? v?????? v??
Sin ?? ??
v?? ?? v??
Cos ?? ??
?? 1
Tan v?? v??

Note:

( Sin ) any angle = Cos the complementary angle of this angle and vice versa

For examples :

sin 30 = cos 60 and sin 45 = cos 45

for any ??? , tan A = ????????
????????

| P a g e 43