Math, asked by YashChauhan1, 1 year ago


Please find the answer for no. 5

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Answered by siddhartharao77
2
(5). Sin 75 degrees.

It can be written as sin(30 + 45).

It is in the form of sin(A + B) = SinA cos B+ cos A sin B

                                               = sin(30) cos (45) + cos(30) sin(45)

                                               =  \frac{1}{2} * \frac{1}{ \sqrt{2}} + \frac{ \sqrt{3} }{2} * \frac{1}{ \sqrt{2} }

                                               =  \frac{1}{2 \sqrt{2} } + \frac{ \sqrt{3} }{2 \sqrt{2}}

                                               =  \frac{ \sqrt{3} +1}{2 \sqrt{2} }


Hop this helps!
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