Question

hello❤❤❤is there any easy method to memorise the trinometric ratios and identities?????......
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Answer 1

ya there is easy way to memorize trigonometric ratios .i.e.
All the trigonometric ratios for angle of measures 0°, 30°, 45°, 60° and 90° are provided in the following table:
here just you need to remember that
sin 30=cos 60
sin 45 =cos 45
sin 0=cos 90
sin 90 =cos0
sin 30/cos 30=tan 30
sin 45 /cos 45=tan 45
sin 60/cos 60=tan 60
sin 90/cos 90=tan 90
sin0/cos 0=tan 0