ত্রিকোণমিতিক অনুপাত
1−sinAcosA; \displaystyle \frac{1-\sin A}{\cos A} ;cosA1−sinA;& ;is equal to
cosA1+sinA \displaystyle \frac{\cos A }{1+\sin A} 1+sinAcosA
sinA1−cosA \displaystyle \frac{\sin A }{1- \cos A} 1−cosAsinA
tanA1+tanA \displaystyle \frac{\tan A }{1 + \tan A} 1+tanAtanA
tanA1+cosA \displaystyle \frac{\tan A }{1 + \cos A} 1+cosAtanA
1−sinAcosA=(1−sinA)(1+sinA)cosA(1+sinA) \displaystyle \frac{1-\sin A}{\cos A}=\frac{(1-\sin A)(1+\sin A)}{\cos A(1+\sin A)} cosA1−sinA=cosA(1+sinA)(1−sinA)(1+sinA)
=1−sin2AcosA(1+sinA)=cos2AcosA(1+sinA) \displaystyle =\frac{1-\sin ^{2}A}{\cos A(1+\sin A)}=\frac{\cos ^{2}A}{\cos A(1+\sin A)} =cosA(1+sinA)1−sin2A=cosA(1+sinA)cos2A
=cosA1+sinA \displaystyle =\frac{\cos A}{1+\sin A} =1+sinAcosA
f(x) = 3cos |x| এর সীমা কত ?
secθ=2 হলে, 1−tan2θ1+tan2θ \frac{1 - \tan^{2}{θ}}{1 + \tan^{2}{θ}} 1+tan2θ1−tan2θ = কত ?
y= cot (525x) এর ডোমেন কত ?
sin−1x+sin−11x+cos−1x+cos−11x,x∉±1\sin^{-1}x+\sin^{-1}\dfrac{1}{x}+\cos^{-1}x+\cos^{-1}\dfrac{1}{x}, x\notin \pm 1sin−1x+sin−1x1+cos−1x+cos−1x1,x∈/±1 is equal to?
