मराठी
महाराष्ट्र राज्य शिक्षण मंडळएचएससी विज्ञान (सामान्य) इयत्ता ११ वी

If tanθ = 12, evaluate 2sinθ+3cosθ4cosθ+3sinθ - Mathematics and Statistics

Advertisements
Advertisements

प्रश्न

If tanθ = `1/2`, evaluate `(2sin theta + 3cos theta)/(4cos theta + 3sin theta)`

बेरीज

उत्तर

Alternative Method :

Given : tan θ = `1/2`

∴ `(2sin theta + 3cos theta)/(4cos theta + 3sin theta) = ((2sin theta)/cos theta + 3)/(4 + (3sintheta)/cos theta)` ...[Dividing numerator and denominator by cos θ]

= `(2tan theta + 3)/(4 + 3 tan theta)`

= `(2(1/2) + 3)/(4 + 3(1/2))`

= `4/((11/2))`

= `8/11`

shaalaa.com
Fundamental Identities
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Trigonometry - 1 - EXERCISE 2.2 [पृष्ठ ३१]

APPEARS IN

संबंधित प्रश्‍न

Evaluate the following:

sin 30° + cos 45° + tan 180°


Evaluate the following : 

cosec 45° + cot 45° + tan 0°


Eliminate θ from the following :

x = 4cosθ − 5sinθ, y = 4sinθ + 5cosθ


Eliminate θ from the following:

2x = 3 − 4 tan θ, 3y = 5 + 3 sec θ


Find the acute angle θ such that 2 cos2θ = 3 sin θ.


If cosecθ + cotθ = 5, then evaluate secθ.


If cotθ = `3/4` and π < θ < `(3pi)/2` then find the value of 4cosecθ + 5cosθ.


Prove the following identities:

`(1 + tan^2 "A") + (1 + 1/tan^2"A") = 1/(sin^2 "A" - sin^4"A")`


Prove the following identities:

(1 + cot θ – cosec θ)(1 + tan θ + sec θ) = 2


Prove the following identity:

`tantheta/(sectheta - 1) = (sectheta + 1)/tantheta`


Prove the following identities:

`cottheta/("cosec"  theta - 1) = ("cosec"  theta + 1)/cot theta`


Prove the following identity:

1 + 3cosec2θ cot2θ + cot6θ = cosec6θ


Select the correct option from the given alternatives: 

`tan"A"/(1 + sec"A") + (1 + sec"A")/tan"A"` is equal to


Select the correct option from the given alternatives:

If θ = 60°, then `(1 + tan^2theta)/(2tantheta)` is equal to


Select the correct option from the given alternatives:

`1 - sin^2theta/(1 + costheta) + (1 + costheta)/sintheta - sintheta/(1 - costheta)` equals


Prove the following:  

sin2A cos2B + cos2A sin2B + cos2A cos2B + sin2A sin2B = 1


Prove the following:

`((1 + cot theta + tan theta)(sin theta - costheta)) /(sec^3theta - "cosec"^3theta)`= sin2θ cos2θ


Prove the following:

2 sec2θ – sec4θ – 2cosec2θ + cosec4θ = cot4θ – tan4θ


Prove the following:

sin4θ +2sin2θ . cos2θ = 1 − cos4θ


Prove the following:

`(sin^3theta + cos^3theta)/(sintheta + costheta) + (sin^3theta - cos^3theta)/(sintheta - costheta)` = 2


Prove the following:

tan2θ − sin2θ = sin4θ sec2θ


Prove the following:

sin6A + cos6A = 1 − 3sin2A + 3 sin4A


Prove the following:

`(1 + cot  +  "cosec" theta)/(1 - cot  +  "cosec" theta) = ("cosec" theta  + cottheta - 1)/(cottheta - "cosec"theta + 1)`


Prove the following:

`("cosec"theta + cottheta + 1)/(cottheta + "cosec" theta - 1) = cottheta/("cosec"theta - 1)`


Prove the following identity:

`(1 - sec theta + tan theta)/(1 + sec theta - tan theta) = (sec theta + tan theta - 1)/(sec theta + tan theta + 1)`


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×