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Sin2x + cos3x= 2sin

Posted by Abhishek Mishra 8 years, 3 months ago

CBSE > Class 11 > Mathematics

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Posted by Abhishek Mishra 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Sunny Nigam 8 years, 3 months ago

Real no. As well as Complex no. 2+or-0jori

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Cosx cosx -sinx sinx =cos2x how

Posted by Swati Vaishya 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Mohd Ahsan Raza Khan 8 years, 3 months ago

If we multiply cosxcosx =cos²x. Sinxsinx = sin²x now, we sub. Cos²x-sin²x = cos2x and it is a formula. If we take only in cos then, cos 2x = cos²x -1+cos²x = 2cos²x-1

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Sin30

Posted by Tannu Kumare 8 years, 3 months ago

CBSE > Class 11 > Mathematics

5 answers

Sunny Nigam 8 years, 3 months ago

sin 30 or (Π/6), sin 30°(By theta table) =1/2 or

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Anubhav Kaushik 8 years, 3 months ago

1/2

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Anurag Pandey 8 years, 3 months ago

1/2

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Aryushi Jha 8 years, 3 months ago

1/2

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Devendran Devendran 8 years, 3 months ago

0.5

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What is binomial theorem

Posted by Anurag Nagar 8 years, 3 months ago

CBSE > Class 11 > Mathematics

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Set-builder form A=[2,4,6,8.....]

Posted by Anubhav Kanwar 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Jatin Sharma 8 years, 3 months ago

X:X Belongs to N, N=2n

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The English alphabets has 5 vowels and 21 consonants. How many words with two different vowels and two different consonants can be formed from the alphabet?

Posted by Shreya Purohit 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Zainam Algaz 8 years, 3 months ago

2 vowels can be chosen in 5C25C2 ways 2 consonants can be chosen in 21C221C2 ways 4 letters can be arranged in 4! ways ∴∴ The number of words consisting of 2 vowels and 2 consonants ⇒5C2×21C2×4!⇒5C2×21C2×4! ⇒5×41×2×21×201×2⇒5×41×2×21×201×2×24×24 ⇒10×210×24⇒10×210×24 ⇒50400

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What is permunation

Posted by Tarun Saxena 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Anubhav Kaushik 8 years, 3 months ago

A permutation is a arrangements in a definite order of a number of objects taken some or all at a time

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What is the som of 5root3

Posted by Verma Family 8 years, 3 months ago

CBSE > Class 11 > Mathematics

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Rohit Lodhi 8 years, 3 months ago

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In a cinema hall there are three entrance doors and two exit doors. In how many ways can a person enter the hall and then come out?

Posted by Harsh Rajput 8 years, 3 months ago

CBSE > Class 11 > Mathematics

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1-cos theta =

Posted by Sourabh Thakur 8 years, 3 months ago

CBSE > Class 11 > Mathematics

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Anubhav Kaushik 8 years, 3 months ago

Sin theta

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Ravi Papnai 8 years, 3 months ago

Sin theta÷2

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Arg(z-1)=arg(z+3i) then find x-1:y

Posted by Vikas Kuntal 8 years, 3 months ago

CBSE > Class 11 > Mathematics

1 answers

Ravi Papnai 8 years, 3 months ago

Let z=x+iy X+iy-1=x+iy+3i and (y=imaginary number along with iota and x=constant number I.e 3,4 etc) TanA=y÷x ,tanA=y÷x TanA=y÷x-1 and TanA=y+3÷x (Comparing both sides) Y÷x-1= y+3÷x ( cross multiplication after we get ) 3x-3-y=0 3(x-1)=y X-1÷y=1÷3 (X-1):y=1:3

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The cost of 7 notebook is 259/4.find the cost of 1 note book

Posted by Aman Chauhan 8 years, 3 months ago

CBSE > Class 11 > Mathematics