Question

sin² 60°+ cos² (3x-9°) = 1 find x​

Answer 1

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sin²theta + cos²theta = 1

sin²60° + cos²(3x-9°) = 1

Comparing,

3x - 9° = 60°

3x = 60° + 9°

3x = 69°

x = 69°/3

x = 23°