FULL MARKS|Exercise ASSIGNMENT II (ANSWER THE FOLLOWING QUESTIONS):|7 Videos
STATISTICS
FULL MARKS|Exercise Assignment (Answer the following question)|10 Videos
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Prove that cos3A=4cos^3 A-3cosA
Verify cos3A=4cos^(3)A-3cosA , when A = 30^(@)
Prove that sin 4A=4 sin A cos^(3) A-4 cos A sin^(3) A
Prove that ((cos^3A-sin^3A)/(cosA - sinA))- ((cos^3A + sin^3A)/(cosA + sinA))= 2sin A cos A
If 3 cot A = 2, then find the value of (4sinA-3cosA)/(2sinA+3cosA)
Prove that (1+sin2A)/(cos2A)=(cosA+sinA)/(cosA-sinA)=tan((pi)/(4)+A)
Let A_1 A_2 A_3 A_4 A_5 A_6 A_1 be a regular hexagon. Write the x-components of the vectors representeed by the six sides taken in order. Use the fact that the resultant of these six vectors is zero, to prove that cos0+cospi/3+cos(2pi)/3+cos(4pi)/3+cos(5pi)/3=0 Use the known cosine values of verify the result. .
In triangleABC , prove that cos^(2)A+cos^(2)B+cos^(2)Cge(3)/(4) .
If 3cotA=2 , then find the value of (4sinA-3cosA)/(2sinA+3cosA)
