This is the basic and conceptual question from trigonometric identities in which we have been asked to find the value of sin50°/cos40° + cosec40°/sec50° – 4cos50°cosec40° by using trigonometric formulas
Kindly give me a detailed solution of this question as it is already asked in various examinations
RS Aggarwal, Class 10, chapter 13C, question no 32
sin50∘/cos40° + cosec 40∘/sec50°−4cos50∘.cosec 40∘
=sin(90−40)∘/cos40° + cosec (90−50)∘/sec50° − 4cos(90−40)∘.cosec 40∘+
=cos40∘/cos40∘+sec50∘/sec50∘−4sin40∘.cosec 40∘
=1+1−4
=−2