Trick to remember trignomatric ratios of different angles....
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Take 5 consecutive numbers 0,1,2,3,4
Divide them by 4
Then do their square root
So numbers are after doing these
0,1/2,1/√2,√3/2& 1 (1). which are trigonometric ratios of sin theta for angles 0,30°,45°,60°,90°
Now for cos theta reverse this that is what we had done in (1) that is 1,√3/2,1/√2,1/2&0 for angles 0°,30°,45°,60°,90°
It becomes trigonometry ratio for complementary angles
Tan theta is sin theta /cos theta
So divide them we get tan theta
Now cosec theta, sec theta ,and cot theta are reciprocal of sin theta, cos theta,tan theta.
Divide them by 4
Then do their square root
So numbers are after doing these
0,1/2,1/√2,√3/2& 1 (1). which are trigonometric ratios of sin theta for angles 0,30°,45°,60°,90°
Now for cos theta reverse this that is what we had done in (1) that is 1,√3/2,1/√2,1/2&0 for angles 0°,30°,45°,60°,90°
It becomes trigonometry ratio for complementary angles
Tan theta is sin theta /cos theta
So divide them we get tan theta
Now cosec theta, sec theta ,and cot theta are reciprocal of sin theta, cos theta,tan theta.
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