Question

prove that cos 30 + sin 30+ tan 45 = 9/5​

Answer 1

To prove that

Cos 30° + sin 30° + tan 45° = 9/5

We know that

cos 30° = √3/2

sin 30° = 1/2

tan 45° = 1

Now adding all

√3/2 + 1/2 + 1

$\dfrac{ \sqrt{3} }{2} + \dfrac{1}{2} + 1 \\ \\ \rightarrow \frac{ \sqrt{3} + 1 + 2 }{2} \\ \\ \rightarrow \: \frac{3 + \sqrt{3} }{2}$

So the Question has some error it can not be proved 9/5.

Answer 2

Answer:

To prove that

Cos 30° + sin 30° + tan 45° = 9/5

We know that

cos 30° = √3/2

sin 30° = 1/2

tan 45° = 1

Now adding all

√3/2 + 1/2 + 1

=√3+1+1/2

= 3+√3/2

So the Question has some error it can not be proved 9/5