Hello Ravi
Please check this post https://www.teachoo.com/5225/955/What-is-value-of-sin--cos--tan-at-0--30--45--60---90-degree----Chapter/category/Trignometric-ratios-of-Specific-Angles---Evaluating/
for the full list
Written on July 5, 2018, 10:19 a.m.