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RD SHARMA-TRIGONOMETRIC FUNCTIONS-Solved Examples And Exercises
- If Tn=sin^nx+cos^nx , prove that (i) 2T6-3T4+10=0
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- Prove that: sqrt((1-sintheta)/(1+sin theta))+sqrt((1+sintheta)/(1-sint...
02:30
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- If sectheta+tantheta=p , obtain the values of sectheta,tantheta and s...
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- If acos theta-b sin theta=c , show that asin theta+b cos theta=+-sqrt(...
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- If t a ntheta+sintheta=m and tantheta-sintheta=n , show m^(2-)n^2=4sq...
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- Prove that: s e c^2theta+cos e c^2theta=cosec^2θ.sec^2θ .
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- Given that: (1+cosalpha)(1+cosbeta)(1+cosgamma)=(1-cosalpha)(1-cosbeta...
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- Prove that: 3(sintheta-costheta)^4+6(sintheta+costheta)^2+4(sin^6theta...
11:30
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- Prove that: 2s e c^2theta-s e c^4theta-2cos e c^2theta+cos e c^4theta=...
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- If A lies in second quadrant and 3tanA+4=0, then the value of 2cotA-5c...
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- Which of the following is correct? s in1^0> s in1 (b) s in1^0<s in1 ...
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- If f(x)=cos^2x+s e c^2x ,t h e n (a)f(x)<1 (b) f(x)=1 (c) 2ltf(x)<1...
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- If sectheta=x+1/(4x), then s e ctheta+t a ntheta= (a)x ,1/x (b) 2x ,...
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- If s e c^2theta=(4x y)/((x+y)^2) is true if and only if x+y!=0 (b) x=...
02:38
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- If cos e cx+cotx=(11)/2 , then t a nx= (a)(21)/(22) (b) (15)/(16) (...
02:26
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- If (3pi)/4ltalphaltpi, t h e nsqrt(2cotalpha+1/(sin^2alpha)) is equal ...
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- If x=rsinthetacosphi,y=rsinthetasinphi and z=rcostheta, then x^2+y^2+...
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- If sintheta+costheta=0 and theta lies in the fourth quadrant, find si...
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- Prove that: sqrt((1-sintheta)/(1+sintheta))+sqrt((1+sintheta)/(1-sinth...
02:30
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- Prove that: cos((3pi)/2+x)cos(2pi+x){cot((3pi)/2-x)+"cot"(2pi+x)}=1
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