Trigonometry> prove that cotx – 2cot2x = tanx prove tha...

prove that cotx – 2cot2x = tanx

prove that tanA =1/2 and tanB = 1/3 then find aA+B

find x in cosecx = 1 + cotx

prove the sine rule (sinA)/a +(sinB)/b + (sinC)/c = 2R

shiva saha , 6 Years ago

Grade 11

2 Answers

Saurabh Koranglekar

Dear student

3.

1= sin x + cosx

Sin x = 1

x = 90°

Regards

Last Activity: 6 Years ago

Vikas TU

Dear student

tan 2x = 2 tanx / (1 - tan²x)

we have solution of Q 2

cotx - 2 cot 2x

= 1/tanx - 2 / tan 2x

= 1/tanx - 2(1 - tan²x)/2 tan x

= 1/tanx - (1 - tan²x)/tanx

= [1 - (1 - tan²x)] / tanx

= tan²x / tanx

= tanx

Please ask single question in a thread.

Last Activity: 6 Years ago

LIVE ONLINE CLASSES

Prepraring for the competition made easy just by live online class.

Full Live Access

Study Material

Live Doubts Solving

Daily Class Assignments

In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.

trigonometry

1 Answer Available

Last Activity: 3 Years ago

Find the general solution of equation tan3∂=cot2∂
For all angles between -720 and +720

trigonometry

1 Answer Available

Last Activity: 3 Years ago

To prove : Cosec(45 degree - A)Cosec(45 degree + A) = 2SecA

trigonometry

1 Answer Available

Last Activity: 3 Years ago

Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)

trigonometry

1 Answer Available

Last Activity: 3 Years ago

WHAT IS THE LIMIT WHEN X TOWARDS TO 0 OF sin6x/5x ? lim𝑥→0 𝑠𝑖𝑛6𝑥/5𝑥

trigonometry

1 Answer Available

Last Activity: 3 Years ago

View all Questions

Trigonometry> prove that cotx – 2cot2x = tanx prove tha...

prove that cotx – 2cot2x = tanx prove that tanA =1/2 and tanB = 1/3 then find aA+B find x in cosecx = 1 + cotx prove the sine rule (sinA)/a +(sinB)/b + (sinC)/c = 2R

shiva saha , 6 Years ago

Saurabh Koranglekar

Vikas TU

LIVE ONLINE CLASSES

Other Related Questions on trigonometry

In ABC, if cot A+cot B+cot C = cosecA cosecB cosecC, then prove that ABC is right angle triangle.

trigonometry

Find the general solution of equation tan3∂=cot2∂For all angles between -720 and +720

trigonometry

To prove : Cosec(45 degree - A)Cosec(45 degree + A) = 2SecA

trigonometry

Derive a formula for the area of the triangle, given b, A, B, and C. That is, derive the formula: (b^2sinAsinC)/(2sinB)

trigonometry

WHAT IS THE LIMIT WHEN X TOWARDS TO 0 OF sin6x/5x ? lim𝑥→0 𝑠𝑖𝑛6𝑥/5𝑥

trigonometry

prove that cotx – 2cot2x = tanx

prove that tanA =1/2 and tanB = 1/3 then find aA+B

find x in cosecx = 1 + cotx

prove the sine rule (sinA)/a +(sinB)/b + (sinC)/c = 2R

Find the general solution of equation tan3∂=cot2∂
For all angles between -720 and +720