Category: Trigonometry

Question Number 182714 by islamo last updated on 13/Dec/22 Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 117046 by 1549442205PVT last updated on 09/Oct/20 $$\mathrm{Calculate}\mathrm{without}\mathrm{using}\mathrm{caculator}:$$$$\mathrm{a})-2\sqrt{2}\sin 10°(2\sin 35°-\frac{\sec 5°}{2}-\frac{\cos 40°}{\sin 5°})$$$$\mathrm{b})\sin 6°-\sin 42°-\sin 66°+\sin 78°$$ Answered by bemath last updated on 09/Oct/20 $$\left(\mathrm{a}\right)\:−\mathrm{4}\sqrt{\mathrm{2}}\:\mathrm{sin}\:\mathrm{35}°\:\mathrm{sin}\:\mathrm{10}°+\:\frac{\sqrt{\mathrm{2}}\:\mathrm{sin}\:\mathrm{10}°}{\mathrm{cos}\:\mathrm{5}°}\:+\:\frac{\mathrm{2}\sqrt{\mathrm{2}}\:\mathrm{cos}\:\mathrm{40}°\:\mathrm{sin}\:\mathrm{10}°}{\mathrm{sin}\:\mathrm{5}°}\:= \…

Question Number 182552 by Acem last updated on 11/Dec/22 $$Findtheperiodofthefollowing:$$$$a\bullet \sin 4x\sin 3x$$$$b\bullet \sin \pi x+\cos x$$$$c\bullet \frac{2{\sin }^{2}3x-3\tan 4x+4\cot 6x}{\mid \mathrm{cosec}8x\mid -{\sec }^{3}10x+\sqrt{\cot 12x}}$$ Terms of Service Privacy Policy…

Question Number 116964 by saorey0202 last updated on 08/Oct/20 Answered by Bird last updated on 08/Oct/20 $$wehave1+ix=\sqrt{1+x^2}{e}^{iarctan\left(x\right)}$$$$1-ix=\sqrt{1+x^2}{e}^{-iarctan\left(x\right)}\Rightarrow$$$$\frac{\mathrm{1}+{ix}}{\mathrm{1}−{ix}}\:={e}^{\mathrm{2}{i}\:{arctan}\left({x}\right)} \…

Question Number 51364 by rahul 19 last updated on 26/Dec/18 $$Thevalueofxforwhich$$$$\sin \left({\cot }^{-1}(1+x)\right)=\cos \left({\tan }^{-1}x\right)is?$$ Commented by rahul 19 last updated on 26/Dec/18…