Question

How to learn the ratio of standard angles of right angled triangle [ like sin 90=?, cos 30=?]....??​

Answer 1

just learn the sin value of all the degrees

the cos values are opposite to the sin values example sin 30 degree = cos 60 degrees. and sin 45 and cos 45 remains same . use the same logic for tan and cot and also for sec and cosec . tan values are sin degrees / cos degrees