trigonometry and pythagoras | Mathematics | Page 1

bold nymph Feb 28, 2025, 5:43 PM

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I need help on finding this question

loud magnetBOT Feb 28, 2025, 5:43 PM

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bold nymph I need help on finding this question

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bold nymph Feb 28, 2025, 5:44 PM

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whoever sees this please tag me when u can help

wide veldt Feb 28, 2025, 5:52 PM

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bold nymph I need help on finding this question

What trig functions should you use, with the given information?

bold nymph Feb 28, 2025, 5:54 PM

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I tried find ac with Pythagoras and got 5.5 not sure if that’s correct

wide veldt Feb 28, 2025, 5:54 PM

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You don’t need the Pythagorean Theorem for this.

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Try to find angle ACB.

bold nymph Feb 28, 2025, 5:54 PM

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Ok give me a minute

wide veldt Feb 28, 2025, 5:55 PM

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Ok.

bold nymph Feb 28, 2025, 5:57 PM

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I got 55°

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@wide veldt

wide veldt Feb 28, 2025, 6:07 PM

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bold nymph I got 55°

Show your work.

bold nymph Feb 28, 2025, 6:08 PM

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wide veldt Feb 28, 2025, 6:09 PM

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bold nymph

Good work.

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Now, can you find angle DCA without using trigonometry?

bold nymph Feb 28, 2025, 6:10 PM

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yeah i think

wide veldt Feb 28, 2025, 6:10 PM

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How so?

bold nymph Feb 28, 2025, 6:10 PM

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actually im not that sure how

wide veldt Feb 28, 2025, 6:13 PM

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bold nymph actually im not that sure how

Note that the angles in a triangle sum to 180 degrees.

bold nymph Feb 28, 2025, 6:15 PM

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Oh so you do 27 + 55 then -180?

wide veldt Feb 28, 2025, 6:20 PM

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bold nymph Oh so you do 27 + 55 then -180?

No, you do 90-27 to find DCA.

bold nymph Feb 28, 2025, 6:21 PM

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oh yes my bad

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but can u find the angle us7ing trigonometry or pythagoras?

bold nymph Feb 28, 2025, 6:22 PM

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wide veldt No, you do 90-27 to find DCA.

wait so i could have just done this from the beginning?

wide veldt Feb 28, 2025, 6:22 PM

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Yes

bold nymph Feb 28, 2025, 6:26 PM

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bold nymph but can u find the angle us7ing trigonometry or pythagoras?

?

wide veldt Feb 28, 2025, 6:29 PM

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bold nymph ?

Yes

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Use sine or cosine

bold nymph Feb 28, 2025, 6:29 PM

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ok thanks

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could you explain to me how you work it out using sine or cosine

wide veldt Feb 28, 2025, 6:35 PM

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bold nymph could you explain to me how you work it out using sine or cosine

Find hypotenuse first

bold nymph Feb 28, 2025, 6:35 PM

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its 5.5

wide veldt Feb 28, 2025, 6:35 PM

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Then find DC using sine, then angle DCA using cosine

bold nymph Feb 28, 2025, 6:35 PM

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ok thanks

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so would the answer be both 55 and 63

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no u arre meant to add them right?

wide veldt Feb 28, 2025, 6:43 PM

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bold nymph no u arre meant to add them right?

Yes.

bold nymph Feb 28, 2025, 6:43 PM

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thanks so much for your help

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+close

vernal apexBOT Feb 28, 2025, 6:44 PM

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bold nymph +close

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vernal apexBOT Feb 28, 2025, 6:44 PM

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vernal apex

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#trigonometry and pythagoras