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Rajan@2021
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Asked: 2021-04-08T20:29:32+05:30 In:

If sec2A = cosec(A-42°) where 2A is an acute angle, find the value of A.

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This question is from trigonometry topic- trigonometric ratios on complementary angles in which we have to find the value of A, if sec2A=cosec(A-42°)

RS Aggarwal, Class 10, chapter 12, question no 11.

class 10 cbsers aggarwaltrigonometric ratios
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      sec2A=csc(A−42∘)
      csc(90−2A)=csc(A−42∘)
      90−2A=A−42
      3A=132
      A=44∘

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