Math, asked by betsybiju43, 1 year ago

if tan(3x+90)=1 find x

Answers

Answered by prakz999

hope this helps you...

Attachments:

betsybiju43: isnt the ans (-15)

prakz999: hw is it -15

betsybiju43: i did it in an other method and got -15

betsybiju43: tan

prakz999: ohhh

betsybiju43: tan (3x+90)=1 given. we know tan 45=1. therefore 3x+90=45 . 3x=45-90. 3x=-45. x=-45/3=-15

prakz999: yeah

shreyasi: Tan(90+3x)= -cot(3x)

betsybiju43: TAN (90-3X)= COT 3X

Answered by shreyasi

tan(90+3x)= tan(45)=1

Using trigonometric identity for tan fubction

90+3x=180n+45

3x=180n-45

x=60n-15

Where 'n' is any integer

So we get different values of x for different values of n like

x= -75, -15, 45, 115 etc.

shreyasi: Please mark brainliest

betsybiju43: HOW IS THIS THE ANS

shreyasi: If you are in 11th you know this is the answer

shreyasi: You can take any of the given values for x all are correct

betsybiju43: BUT THIS IS FROM 10TH QUESTION PAPER

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