Question

cot sqare 60° + sin square 45° + sin square 30° + cos square 90°= 13/12​

Answer 1

Answer:What is question

Step-by-step explanation:

What to find

Answer 2

Answer:

cot 60= 1/root 3

sin 45= 1/root 2

sin 30=1/2

cos 90= 0 according to the trigonometric values of specific angles.

now for your answer

cot square 60 + sin square 45 + sin square 30 + cos square 90=13/12

(1/root 3)^2 + (1/ root 2)^2 + (1/2)^2 + 0

1/3 + 1/2 +1/4

LCM = 12

4/12+6/12+3/12=13/12.

Hence proven