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MODERN PUBLICATION-TRIGONOMETRY-Exercise 3( e)Long Answer type Question-I
- Prove that: ("sin"(B-C))/(cosBcosC)+("sin"(C-A))/(cosCcosA)+("sin"(A-B...
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- If cos(alpha-beta)+cos(beta-gamma)+cos(gamma-alpha)=-3/2 , prove that ...
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- If theta+phi=45^(@),prove that (cot theta-1)(cotphi-1)=2
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- If (1+tantheta)(1+tanphi)=2 then theta+phi=
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- Prove that:(i)"tan"69^(@)+"tan"66^(@)+1="tan"69^(@) "tan"66^(@) (ii)...
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- Prove that : (i)"tan"3A-"tan"2A-"tan"A="tan"3A "tan"2A "tan"A (ii...
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- If ys invarphi=x s in(gamma+delta)=cos(alpha-beta)sin(gamma-delta), pr...
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- If cot alpha cot beta=2 show that (cos(alpha+beta))/(cos(alpha-beta))...
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- Prove that: (i) tan 50^(@)="tan"40^(@)+2 tan 10^(@) (ii)2 tan 70^(@)...
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- If cos A=(5)/(13), and sin B=(4)/(5), find sin (A+B), where A,B,(A+B) ...
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- If tanx=a/(a+1) and tany=1/(2a+1) then show that one of the values of ...
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- In any quadrilateral ABCD, show that: cosA cosB-cosC cosD="sin"A "sin"...
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- Find "a" and "b" such that a lt 3 "cos" theta+5 "sin"(theta-(pi)/(6)) ...
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