If tan 15 = 2 – sqrt(3), then show that 2 tan 1095 + cot 975 + tan ( – 195) = 4 – sqrt(3). https://youtu.be/vGd7_JgvsHQ
Tag Archives: Class XI Mathematics
Trigonometric ratios of any angle and associated angles
Find the value of sin^2 1 + sin^2 3 + sin^2 5 + … + sin^2 85 + sin^2 87 + sin^2 89 https://youtu.be/2v5GsotPoMs
Trigonometric ratios of any angle and associated angles
Prove that, the value of ((sin^3 (2 pi – theta))/(cos^2 ((3/2) pi + theta))).((cos^3 (2 pi – theta))/(sin^3 (2 pi + theta))).((tan (pi – theta))/(cosec^2 (pi – theta))).((sec^2 (pi + theta))/(sin theta)) is independent of theta. https://youtu.be/gVWFLHTXOsY
Trigonometric ratios of any angle and associated angles
If tan 25 = a, prove that (tan 155 – tan 115)/(1 + tan 155 tan 115) = (1-a^2)/(2a) https://youtu.be/BO_ldaAbow8
Trigonometric ratios of any angle and associated angles
cosec (alpha – beta) = 2/sqrt(3) & sec (alpha + beta) = sqrt(2). Find the least positive values of alpha & beta https://youtu.be/Rb86xXb-NME
Trigonometric ratios of any angle and associated angles
Problem 3(v). Section IV. Class XI SN Dey https://youtu.be/BZgQvYB8its
Trigonometric ratios of any angle and associated angles
Solve for 0 degree less than = theta less than = 360 degree: tan theta + cot theta = 2 sec theta. https://youtu.be/V9QXu697KUU
Trigonometric ratios of any angle and associated angles
Solve for 0 degree less than = theta less than = 360 degree: cos theta – square root of 3 sin theta = 2
Trigonometric ratios of any angle and associated angles
Solve for 0 degree less than = theta less than = 360 degree: cos^ 2 theta – sin theta = 1/4. https://youtu.be/DeYlbyDqgA8
Trigonometric ratios of any angle and associated angles
Prove that [cos (2p pi +- (pi / 4)] / [sin (q pi + (-1)^q (pi / 4)] = 1, where p and q are any integers. https://youtu.be/Cow85RqJSNA
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