Part - 3 Lecture - 3 Chapter 2 Inverse Trigonometric Functions
“People often say that motivation doesn’t last. Well, neither does bathing–that’s why we recommend it daily.” –Zig Ziglar
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Questions discussed in this \lecture
Simplify:
15. \tan ^{-1} \sqrt{\frac{a-x}{a+x} }
16. \tan ^{-1} \left(\frac{\cos x}{1-\sin x} \right), -\frac{\pi }{2} <x<\frac{\pi }{2} (NCERT Examp\le 5)
17. \sin ^{-1} \left\{\frac{x+\sqrt{1-x^{2} } }{\sqrt{2} } \right\}
18. \tan ^{-1} (x+\sqrt{1+x^{2} } )
19. \sin \left\{2\tan ^{-1} \sqrt{\frac{1-x}{1+x} } \right\}
20. \sin ^{-1} \left(\frac{\sin x+\cos x}{\sqrt{2} } \right)
21. \tan ^{-1} \left[\frac{a\cos x-b\sin x}{b\cos x+a\sin x} \right]\text{ if }, \frac{a}{b} \tan x>-1 (NCERT Examp\le 12)
22. \cot ^{-1} \left(\frac{\sqrt{1+\sin x} +\sqrt{1-\sin x} }{\sqrt{1+\sin x} -\sqrt{1-\sin x} } \right)=\frac{x}{2} , x\in \left(0, \frac{\pi }{4} \right) (NCERT Miscellaneous Exercise Q10)
23. \tan ^{-1} \left(\frac{\sqrt{1+x} -\sqrt{1-x} }{\sqrt{1+x} +\sqrt{1-x} } \right)=\frac{\pi }{4} -\frac{1}{2} \cos ^{-1} x, -\frac{1}{\sqrt{2} } \le x\le 1 (NCERT Miscellaneous Exercise Q11)
