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we have tan(a+b) = (tan a +tan b)/(1-tan a tan b) tan(40+10) = (tan40+ tan10)/(1-tan40tan10) tan50 = (tan40+ tan10)/(1-tan40tan10) tan50(1-tan40tan10)=tan40+ tan10 tan50-tan50tan40tan10 = tan40+tan10 and tan50 = tan(90-40) = cot40 => tan50-cot40tan40tan10 = tan40+ tan10 tan50-tan10 = tan40+ tan10 because cot40= 1/tan40 tan50 = tan40+2tan10

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Let A={a,b},B={a,b,c}. Is A

Posted by Neelkamal Sarmah 7 years, 6 months ago

CBSE > Class 11 > Mathematics

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Manika Gupta 7 years, 6 months ago

Please complete your queation

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I have a dowt

Posted by Amit Singh 7 years, 6 months ago

CBSE > Class 11 > Mathematics

2 answers

Amit Singh 7 years, 4 months ago

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Himanshu Jha 7 years, 6 months ago

What ?

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(99)^5

Posted by Vishu Kamble 7 years, 6 months ago

CBSE > Class 11 > Mathematics

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Ritik Raj 7 years, 6 months ago

9,509,900,499

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Sin`2 A + sin'2 (A-B)-2sinAcosBsin (A+B)= sin'2B PLEASE HELP ME

Posted by Edu Friends 7 years, 6 months ago

CBSE > Class 11 > Mathematics

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Prove that 2cospi

Posted by Edu Friends 7 years, 6 months ago

CBSE > Class 11 > Mathematics

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Ritik Raj 7 years, 6 months ago

2 cos pi=2 cos 180=2(-1)=-2

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Tany=3tanx , prove tan(x+y)=2sin2y/1+2cos2y

Posted by Deepu Rai 7 years, 6 months ago

CBSE > Class 11 > Mathematics

1 answers

Akash Singh 5 years, 4 months ago

tan (x+y) = (2sin 2y) /(1+2cos2y) L.H.S :- tan (x+y) =(tan x +tan y ) / (1-tan x tan y) Substitute, the value of tan x with (tan y)/3 =(tan y/3 +tany) / (1-tan y/3 • tan y) =(tan y + 3tan y) / (3-tan²y) =(4tan y) / (3- tan²y) =(4 sin y/cos y) / (3 - sin²y/cos²y) =(4sin y • cos y) / (2cos² y +cos² y -sin²y) = (2 sin 2y) / (1 + 1 - 2sin²y + cos 2y) = (2 sin 2y) / (1 + 2 cos 2y) ☑️☑️☑️☑️ L.H.S =R.H.S ? Proved

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What is value of root4

Posted by Swayman Singh 7 years, 6 months ago

CBSE > Class 11 > Mathematics

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Tripti Sharma 7 years, 6 months ago

+ - 2

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Cos 68 × Cos 8 + sin 68 × sin 8 Pls solve this with solution

Posted by Nancy Rajput 7 years, 6 months ago

CBSE > Class 11 > Mathematics

2 answers

Nancy Rajput 7 years, 6 months ago

Thanks

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Neeta Rawat 7 years, 6 months ago

This is from formula cos(A-B) : cosA cosB + sinA sinB So cos (68-8) Cos(60) = 1/2 -ans.

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0 is even why

Posted by Roshan Kumar 7 years, 6 months ago

CBSE > Class 11 > Mathematics

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Nancy Rajput 7 years, 6 months ago

0 is even because it is divisible by 2

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Write the range of the function f(x)=sin[x] where (-pi/4)<=x<=pi/4.

Posted by Xyz Abc 7 years, 6 months ago

CBSE > Class 11 > Mathematics

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a survey shows that 63% of the people watch news channel whereas 76 percent watch another channel then find the value of x

Posted by Gurvin Kaur Kalra 5 years, 8 months ago

CBSE > Class 11 > Mathematics

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Prove that sin square 72 degree minus cos square 30 degree equal to root 5 minus 1 by 8

Posted by Ayush Das 7 years, 6 months ago

CBSE > Class 11 > Mathematics

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3×6+6×9+9×12+.....+3n×3n+3=3n(n+1)(n+2)

Posted by Reyansh Singh 7 years, 6 months ago

CBSE > Class 11 > Mathematics

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Lim x³+8÷x+2 X-2

Posted by Dhani Prajapati 7 years, 6 months ago

CBSE > Class 11 > Mathematics

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Aman Gupta 5 years, 8 months ago

]®\|<|\¡®\¡in\®«®\]/:-) 3/&)&)@+@/$7$($7$=$72/$:$ &)&'&:$/$) 3/$)&/:-) 7$/$)38$/$)$)27$/$73)&)$)&)&:/37$/3&/&)3=)&3)$=&7 38$ _/3!2/$))3)&62)/&: #3)7$)

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Explain modulus function with examples

Posted by Aleena Singh 7 years, 6 months ago

CBSE > Class 11 > Mathematics