Question

if sin sq 45°- sin sq 60°=x sin 45°• cos 45°,then x =
plz help me
I AM IN TROUBLE
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Answer 1

Answer:

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YUR ANSWER IS OPTION C

Step-by-step explanation:

sin ² 45 ° -  sin ² 60° = x sin 45 ° X cos 45 °,

sin ² 45 ° = (1 /√ 2) ² = 1/2

sin ² 60°= ( √3/ 2 )² = 3 /4

sin 45 ° =  1 / √2

cos 45 °, = 1/ √2

substituting the values

 1/2-3/4 = x   1 / √2 .   1 / √2

1/2-3/4 = x 1/2

2-3/4 = x 1/2

-1/4= x1/2

x= -2/4 = -1/2

thererfore option c