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Value of tan 40°

    • Posted by Aastha Mittal 40 minutes ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Find domain and range of f(x)=1/(4-x x)

    • Posted by Madhumita Kumari 57 minutes ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    For any two sets A and B ,prove that: P(A) =P(B)

    • Posted by Shubham Kamra an hour ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Prove that tan20°tan40°tan80°=tan60°

    • Posted by 👉Rahul👈 🔥Gusain🔥 4 hours ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Gaurav Seth 3 hours ago

    <pre> tan 40 * tan 80* tan 20=(sin 40 *sin 80) * sin 20 /(cos 40 *cos 80 ) cos 20</pre>

     now, multiplying numerator and denominator by 2,

                                     =(2*sin 40*sin 80) *sin 20 /(2 cos 40*cos 80) cos 20]

                                     =(cos 40- cos 120)*sin 20/( (cos 120+ cos 40) cos 20

                                     =(2 cos 40 +1) sin 20 /(2 cos 40-1) cos 20

                                     =(2 cos 40*sin 20 +sin 20) /(2 cos 40 cos 20 -cos 20)

                                     =(sin 60 -sin 20 +sin 20)/ (cos 60+sin 20-sin 20)

                                    = sin 60/cos 60

                                     =tan 60.

    1Thank You

    ANSWER
    Sin ^2a +cos^2a=?

    • Posted by Kapil Sen 12 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Sin2x prove that is equal to cos2x

    • Posted by Mayur Rajput 14 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    If 3x, x+2 and 8 are three consecutive terms of an A.P. find its 4th term

    • Posted by Prachi Mishra 14 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Find the focus and directix of the parabola 2x+y2=0

    • Posted by Prahalad Soni 15 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Find the no. of subsets of the set A=(a, b, c)

    • Posted by Prahalad Soni 15 hours ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Nikki Singh☺️😊 14 hours ago

    No. of subset = 2^ n where n is no. Of elements Therefore, it has 8 subset (Phi),(a) , (b) , ( c) , ( a,b) , (a,c) , ( b,c) , ( a,b,c)

    0Thank You

    ANSWER
    Prove that sinx +sin2x +sin3x=0

    • Posted by Gaurav Sarkar 16 hours ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Harsh Sharma 15 hours ago

    Hence proved

    3Thank You

    ANSWER
    Find the solution region of inequalities 2x+y>2 y-x>-1 x+2y<8 x,y>0 Also find the coordinates of vertices of region. Please answer fast.....

    • Posted by Himanshu Kumar 17 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    In a group of 50 students 14 drink orange juice but not eat apple 30 drink orange juice and each student like at least one of them . Find (i) how many drink orange juice as well as eat apple (ii) how many eat apple but not drink orange juice

    • Posted by Jitisha Kalra 18 hours ago

    CBSE > Class 11 > Mathematics
    • 3 answers

    Akash Choudhary Dav Gandhinagar 15 hours ago

    Same question coming in my xam And i got same answer.

    0Thank You

    Keshav Bindal 17 hours ago

    By Using, n(A U B) = n(A) + n(B) - n(A intersection B) . n(A-B) = n(A) - n(A intersection B)

    0Thank You

    Keshav Bindal 18 hours ago

    i) 30-14 = 16 . ii) Students who eat apple = 50-30+16 = 36 . Students who eat apple, but not drink juice = 36-16 = 20

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    ANSWER
    A line is such that its segment between the lines 4x+3y-21=0 and 10x+y-59=0 is bisected at (4,6). find it's equation. What is answer

    • Posted by Shreya Dixit 18 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    If sin x=3/5 where 0< x <π/4,then find cos2x

    • Posted by Saday Samanta 21 hours ago

    CBSE > Class 11 > Mathematics
    • 2 answers

    Keshav Bindal 17 hours ago

    Cos2x = 1-2Sin square x = 1- 2(3/5)^2 = 1- 18/25 = 7/25

    0Thank You

    Akash Choudhary Dav Gandhinagar 20 hours ago

    Are ye que mera xam m aaya tha aaj My answer was 7 / 25

    1Thank You

    ANSWER
    Supplimentry part class 11,compler number

    • Posted by Jacky Choudhary 1 day, 5 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Write the coordinates of the point of intersect of the parabola y^2=4ax and its la tus rectum

    • Posted by Parth Thacker 1 day, 11 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Find the value of Sin 18° and Sin 36°

    • Posted by Satyam Barnwal 1 day, 12 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    domain and range of f(x)=1/(1-(x^2))

    • Posted by Muskan Saini 1 day, 12 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    If cos theta=cosA.cosB then prove that tan(theta+A/2).tan(theta-A/2)=tan^2(B/2)

    • Posted by Himika Jain 1 day, 16 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    How to find cumulative frequency ins stats

    • Posted by Chelsi Mewara 1 day, 18 hours ago

    CBSE > Class 11 > Mathematics
    • 2 answers

    Ishan Singh 1 day, 15 hours ago

    Ex f=4 6 7 2 5 Cf =4+6+7+2+5

    1Thank You

    Ishan Singh 1 day, 15 hours ago

    Cf is sum of previous frequency

    0Thank You

    ANSWER
    Subset

    • Posted by Sanjay Gangrade 1 day, 18 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    any one have previous years maths ques pprs

    • Posted by Sahil Goria 1 day, 19 hours ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Abhinav Agarwal 1 day, 15 hours ago

    Available in this app

    0Thank You

    ANSWER
    Prove that tan20°+tan40°+tan80°=tan60°

    • Posted by 👉Rahul👈 🔥Gusain🔥 1 day, 19 hours ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Abhinav Agarwal 1 day, 14 hours ago

    Convert into sin and cos and then solve

    1Thank You

    ANSWER
    2017 and 2018 paper

    • Posted by Ishan Kumar 1 day, 20 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Find the n term of series: 3+7+13+21+31+.........+n

    • Posted by Adarsh Thakur 1 day, 20 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Graph of 3 lines

    • Posted by Manu Sharma 1 day, 21 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Find the multiplicative inverse of 4-√-9

    • Posted by Biju Biju 1 day, 22 hours ago

    CBSE > Class 11 > Mathematics
    • 3 answers

    Khushi Dimple Sharma 20 hours ago

    4/root(16+9)-3i/root(16+9) =4/25-3i/25 =(4-3i)/25

    0Thank You

    Adarsh Thakur 1 day, 20 hours ago

    Firstly u take reciprocal of this value then rationalise the answers is in the form of a+ib

    0Thank You

    Shatayu Ganvir 1 day, 21 hours ago

    Do reciprocol and rationalise it

    0Thank You

    ANSWER
    Find the sum to n terms of the A.P. whose k^th term is 5k+1

    • Posted by Neelam Sharma 1 day, 23 hours ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Covert the complex number 3(cos5 /\ /3 - i sin /\ / 6) into polar form

    • Posted by Shiwani Kumari 2 days ago

    CBSE > Class 11 > Mathematics
    • 0 answers
    ANSWER
    Show that the points A( 4,6,-5), B(0,2,3) and C(-4,-4,-1) form the vertices of an isoscles triangle

    • Posted by Ayush Tyagi 2 days ago

    CBSE > Class 11 > Mathematics
    • 1 answers

    Rajat Sharma 1 day, 14 hours ago

    Just calculate the distance between ab BC and CA uses distance formula then you will get the measurement of two of the sides equal hence prove that it is an isosceles triangle

    0Thank You

    ANSWER

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