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MODERN PUBLICATION-TRIGONOMETRY-FREQUENTLY ASKED QUESTIONS
- Prove that n( " cos " 4x + " cos " 3x + " cos " 2x)/(" sin " 4x +...
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- (( sin 7x + sin 5x)+(sin 9x + sin 3x))/((cos 7x + cos 5x)+(cos 9x+ cos...
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- Prove that cosalpha+cosbeta+cosgamma+cos(alpha+beta+gamma)=4cos((alpha...
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- If s intheta=n"sin"(theta+2alpha) , prove that tan(theta+alpha)=(1+n)/...
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- If alpha+beta+90^0 , find the maximum and minimum values of s inalphas...
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- Prove that (tan 5theta + tan 3theta)/(tan 5theta - tan 3theta) = 4 c...
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- Find "sin" 2theta when "sin" theta+cos theta=1.
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- Prove that: "tan"A+cotA=2"cosec" 2A and deduce that "tan" 75^(@)+co...
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- Prove that (i) (sec 8A -1)/(sec 4A -1) =(tan 8A)/(tan 2A) (ii) (c...
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- If tan (alpha-beta)=(sin 2beta)(3-cos 2beta), then
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- Prove that: cos A cos 2A cos 2^(2)A cos 2^(3)A….....cos 2^(n-1)A=("sin...
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- If "sin"A=(1)/(2)(x+(1)/(x)),prove that: "sin" 3A+(1)/(2)(x^(3)+(1)...
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- Prove that: cos^(2)pi/8 + cos^(2)(3pi)/(8) + cos^(2)(5pi)/(8)+ cos^(...
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- Prove that: cos 6x=32 cos^(6)x-48 cos^(4)x+18 cos^(4)x+18 cos^(2)x...
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- sqrt2+ sqrt3+sqrt4+sqrt6 is equal to
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- Find the value of "tan" 22^(@) 30'.
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- Prove that:tan4x=(4tanx(1-tan^2x))/(1-6tan^2x+tan^4x)
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- If "sin" theta+"sin" phi=a and cos theta+cos phi=b find: (i) "sin"(...
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- If "tan" x=(3)/(4),piltxlt(3 pi)/(2), find the values of "sin"(x)/(2),...
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- If alphaa n dbeta are distict roots of acostheta+bs intheta=c , prove ...
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