Trigonometry - Class 10 CBSE

Trigonometry - Class 10 CBSE

by

Salman Nizarudin

Multiple Choice

If in a right angled ∆ABC, tan B =  $\frac{12}{5}$ ,  then find sin B. (2014)

•  $\frac{5}{12}$  

•  $\frac{12}{13}$  

•  $\frac{13}{5}$  

•  $\frac{13}{12}$  

Multiple Choice

In an acute angled triangle ABC, if sin (A + B – C) = $\frac{1}{2}$  and cos (B + C – A) = $\frac{1}{\sqrt{2}}$ , find ∠A, ∠B and ∠C. (2012)

•  $A=70\degree\ ,\ B=40\degree\ ,\ C=70\degree$  

•  $A=60\degree\ ,\ B=30\degree\ ,\ C=90\degree$  

•  $A=67.5\degree\ ,\ B=37.5\degree\ ,\ C=75\degree$  

•  $A=80\degree\ ,\ B=20\degree\ ,\ C=80\degree$  

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