Inverse Trigonometric Functions

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We have,

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%3D%20%5Cfrac%7B(sin%5C%2C60%5E%7B%5Ccirc%7D%20cos%20%5C%2C15%5E%7B%5Ccirc%7D%20-%20cos%2060%5E%7B%5Ccirc%7D%20sin%2015%5E%7B%5Ccirc%7D)%20%2B%0Ai(cos%2060%5E%7B%5Ccirc%7D%20cos%2015%5E%7B%5Ccirc%7D%20%2B%20sin%20%5C%2C60%5E%7B%5Ccirc%7D%20sin%5C%2C15%5E%7B%5Ccirc%7D)%7D%7Bcos%5E%7B2%7D%2015%5E%7B%5Ccirc%7D%20%2B%20sin%5E%7B2%7D%2015%5E%7B%5Ccirc%7D%7D

%3D%20sin%20(60%5E%7B%5Ccirc%7D%20-%2015%5E%7B%5Ccirc%7D)%20%2B%20i%20%5C%2C%20cos%20(60%5E%7B%5Ccirc%7D%20-%2015%5E%7B%5Ccirc%7D)

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Chapter Questions
2 MCQs