HELP Maths Questions!!

These questions are so confusing anyone can guide me through them.

If your talking about the triangle say Question 1
If your talking about the other one say Question 2

(edited 7 years ago)

Original post by NothingButWaleed

These questions are so confusing anyone can guide me through them.

If your talking about the triangle say Question 1
If your talking about the other one say Question 2

Please show some attempt.

Mate it's right angles, you can get by without the cosine rule.

Reply 2

NothingButWaleed

Original post by RDKGames

Please show some attempt.

Mate it's right angles, you can get by without the cosine rule.

I still dont get how to do it, i literally dont get a thing!

Reply 3

RDKGames

Study Forum Helper

Original post by NothingButWaleed

I still dont get how to do it, i literally dont get a thing!

Okay. Label angle

CBA

\theta

We know that

CBcos\theta = 13

as CB is the hypoteneuse and 13 is the adjacent side to the angle theta.

Means that

CB=\frac{13}{cos\theta}

How do we find theta? Use trigonometry inside the smaller triangle to find it.

(edited 7 years ago)

Reply 4

NothingButWaleed

Original post by RDKGames

Okay. Label angle

CBA

\theta

We know that

CBcos\theta = 13

as CB is the hypoteneuse and 13 is the adjacent side to the angle theta.

Means that

CB=\frac{13}{cos\theta}

How do we find theta? Use trigonometry inside the smaller triangle to find it.

what do you mean by label cba as 0?

Reply 5

RDKGames

Study Forum Helper

Original post by NothingButWaleed

what do you mean by label cba as 0?

The angle made by the lines CB (DB works too) and BA. Label it

\theta

and attempt to find what it is using the smaller triangle.

(edited 7 years ago)

Reply 6

Naruke

Original post by NothingButWaleed

what do you mean by label cba as 0?

If you don't understand what's being explained to you, then you don't properly understand the topic.

Watch all the videos in the trig section which involve triangles

http://www.examsolutions.net/maths-revision/syllabuses/GCSE/period-1/Higher/module.php

then revisit this question