Question

solve this in notebook pls​

Answer 1

Answer:

Step-by-step explanation:

sin 135 = sin ( 90 + 45 ) = cos 45 = 1/√2= √2 /2

cos 120 = cos ( 90 + 30 ) = - sin 30 = -1/2

=  √2 / 2 + 1/2 / √2 / 2 + 1/2

=√2 + 1 / √2 - 1

if we rationalise the denominator

we will ger ( √2 + 1 )^2

   = 3 + 2√2

Answer 2

Hey mate

here's your answer

hope it helps

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