Home
Class 11
MATHS
Evaluate : cos^(2)76^(@) +cos^(2)16^(@) ...

Evaluate : `cos^(2)76^(@) +cos^(2)16^(@) - cos76^(@).cos16^(@)`

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • MODEL TEST PAPER -16

    ICSE|Exercise SECTION-B |10 Videos

  • MODEL TEST PAPER -16

    ICSE|Exercise SECTION-C |9 Videos

  • MODEL TEST PAPER -13

    ICSE|Exercise SECTION -C|10 Videos

  • MODEL TEST PAPER -2

    ICSE|Exercise Section C |8 Videos

Similar Questions

Explore conceptually related problems

Write the value of cos^2 76^@+cos^2 16^@- cos76^@ cos16^@

Prove that cos 36^(@) cos 72^(@) cos 108^(@) cos 144^(@)=1//16 .

Prove that: i) cos10^(@)cos30^(@)cos50^(@)cos70^(@)=3/16 ii) cos20^(@)cos40^(@)cos60^(@)cos80^(@)=1/16 iii) 4cos12^(@)cos48^(@)cos72^(@)=cos36^(@) iv) cos40^(@) cos80^(@)cos160^(@)=-1/8

Find the value of ((cos1^(@)+sin1^(@))(cos2^(@)+sin2^(@))(cos3^(@)+sin3^(@))...(cos 45^@sin45^@))/( cos1^(@)cos2^(@)cos3^(@)...cos45^(@))

Statement-1: The vlaue of cos20^(@)cos40^(@)cos60^(@)cos80^(@)is1/16. Statement-2: for any theta, cos thetacos(60^(@)-theta)cos(60^(@)+theta)=1/4cos3theta

Prove that cos6^@ . cos42^@. cos66^@ cos78^@= 1/16

Evaluate: ((cos 47^(@))/(sin 43^(@)))^(2)+((sin72^(2))/(cos 18^(@)))^(2)-2cos^(2)45^(@)

Evaluate: ((sin 77^(@))/(cos 13^(@)))^(2)+((cos 77^(@))/(sin 13^(@)))^(2)-2cos^(2)45^(@)

Find the value of cos^2pi/(16)+cos^2(3pi)/(16)+cos^2(5pi)/(16)+cos^2(7pi)/(16)dot

cos(36^@-A)cos(36^@+A)+cos(54^@+A)cos(54^@-A) = cos2A