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# Dear Sir,How do you calculate angles like sine of 37 or sine of 33 or such odd angles?Thankyou,Tejaswin Singh

147 Points
10 years ago

Dear Tejaswin

We can calculate these type of angel ,with the knowledge of available formula and known angels

for example

sin33 = sin(15+18)

=sin15 cos18 + cos15 sin18

we know these values

sin33 = [√3 -1]/2√2 * √{10 +2√5)/4    + [√3 +1]/2√2 * (√5 -1)/4

simplyfy and you will get the result

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