Question 13 MarksSimplify: $\frac{\sin A}{\cot A+\operatorname{cosec} A}-\frac{\sin A}{\cot A-\operatorname{cosec} A}$AnswerSelfView full question & answer→
Question 23 MarksFind the value : $\tan ^2 \mathrm{~A}+\cot ^2 \mathrm{~A}-\sec ^2 \mathrm{~A} \operatorname{cosec}^2 \mathrm{~A}$AnswerSelfView full question & answer→
Question 33 MarksFor what value of $\alpha, 2 \sin ^2 \alpha-\cos ^2 \alpha=2$ ?AnswerSelfView full question & answer→
Question 43 MarksSimplify : $\left(\sec ^2 \theta-2 \tan ^2 \theta\right)(1-\sin \theta)(1+\sin \theta)$AnswerSelfView full question & answer→
Question 53 MarksProve that: $\left(\sin ^2 \mathrm{~A} \cos ^2 \mathrm{~B}-\cos ^2 \mathrm{~A} \sin ^2 \mathrm{~B}\right)=\sin ^2 \mathrm{~A}-\sin ^2 \mathrm{~B}$.AnswerSelfView full question & answer→
Question 63 MarksProve that $\frac{1-\sin \theta}{1+\sin \theta}=(\sec \theta-\tan \theta)^2$AnswerSelfView full question & answer→
Question 73 MarksProve that $\sin ^4 \theta-\cos ^4 \theta=1-2 \cos ^2 \theta$AnswerSelfView full question & answer→
Question 83 MarksProve that : $\frac{\sin A}{1+\cot A}-\frac{\cos A}{1+\tan A}=\sin A-\cos A$AnswerSelfView full question & answer→
Question 93 MarksProve that : $(\operatorname{cosec} \theta-\sin \theta)(\sec \theta-\cos \theta)(\tan \theta+\cot \theta)=1$.AnswerSelfView full question & answer→
Question 103 MarksProve that $\sqrt{\sec ^2 \theta+\operatorname{cosec}^2 \theta}=\tan \theta+\cot \theta$AnswerSelfView full question & answer→
Question 113 MarksProve the following identity : $\frac{\sec A}{\sec A-1}+\frac{\sec A}{\sec A+1}=2 \operatorname{cosec}^2 A$AnswerSelfView full question & answer→