sin 300 = -sin 60 = -sqrt(3)/2 you can get this because using the unit circle.
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what is the value of sin 75 degree
The answer is 42.
sin-1(0.707) = 44.99134834 or about 45 degrees
Sin(X) = 0.9 X = Sin^(-1) 0.9 X = 64.158... degrees.
The value of tan A is not clear from the question.However, sin A = sqrt[tan^2 A /(tan^2 A + 1)]