Question

1. sin (150° + x) + sin (150° – x) = 0​

Answer 1

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$\large\mathcal\red{solution}$

=>sin (150° + x) + sin (150° – x) = 0

=>2sin(150°)cos(x)= cos(90°)

=>2×(1/2)×cos(x)=cos(90°)

=>cos(x)=cos(90°)

x=90°

$\underline{\large\mathcal\red{hope\: this \: helps \:you......}}$

Answer 2

Answer:

Answer is in the attachment....

I hope that the answer is correct..