Question

Theorem: a perpendicular drawn from the centre of a circle on its chord bisect the chord.

prove it.​

Answer 1

Answer:

Page no.77

Step-by-step explanation:

maths textbook

Answer 2

Question:-

if tan Θ = 2 then find sec Θ.

Answer:-

Given:-

tan Θ = 2

To Find:-

sec Θ ?

Here we have two types of trigonometric ratios: tan Θ and sec Θ. We know about their relation:

sec² Θ - tan² Θ = 1

Or

sec² Θ = 1 + tan² Θ

So, let's find arrange the given to get the value of sec Θ:

➛ tan Θ = 2

Squaring both sides,

➛ tan² Θ = 4

Adding one to both sides of the eq.

➛ 1 + tan² Θ = 5

➛ sec² Θ = 5

Square-rooting both sides,

➛ sec Θ = \pm± √5

Hence,

The required value of sec Θ is \pm± √5

Extra Tips:

Some ways to conquer Trigonometric questions:

• Remember all the identities by practising well.
• Always start from the complex side of a proof.
• Don't go for quantity, instead try solving them smartly focusing on quality.
• There are many ways to solve a single equation, choose the smartest way.
• Try drawing a right-angled in some of the questions.