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Question : 24 of 160
Marks:
+1,
-0
Solution:
Consider the equation.
tan−1()+sin−1()=cos−1x Let
θ1=Tan−1(t) and
θ2=sin−1() Then,
tan‌θ1= and
sin‌θ2= Therefore,
cos(θ1+θ2)=x x=cos‌θ1‌cos‌θ2−sin‌θ1‌sin‌θ2 =.−. =
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