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Sin^2 x +cos2 30 degree =5/4
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Answer:
Step-by-step explanation:
Sin²x +cos²30 = 5/4..... EQ 1
But cos30 = √3/2
Therefore cos²30 = (√3/2)²
=3/4
Substitute value of
Cos²30 in EQ 1
Therefore sin²x + 3/4 = 5/4
Sin²x = 5/4 - 3/4
Sin²x = 2/4
Sin²x = 1/2
Sinx = √1/√2
Sinx = 1/√2
But sin45 = 1/√2
Therefore sinx = sin45
Therefore X = 45
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