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KengaRu [80]
3 years ago
6

Find the exact value of cos 75 by using a sum or difference formula

Mathematics
1 answer:
anygoal [31]3 years ago
3 0
Cos 75 = 45 + 30

Formula: cos 45 x cos 30 - sin 45 x sin 30

Cos 45 = root 2 / 2
Cos 30 = root 3 / 2
Sin 45 = root 2 / 2
Sin 30 = 1 / 2

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Can anyone help me with this. please​
zvonat [6]

Answer:

Step-by-step explanation:

using pythagoras theorem

a^2+b^2=c^2

7^2+KL^2=25^2

49+KL^2=625

KL^2=625-49

KL=\sqrt{576

KL=24

take M as reference angle

using tan rule

tan M=/opposite/adjacent

tan M=KL/ML

tan M=24/7

5 0
3 years ago
Name the adjacent angles in the following diagram
svlad2 [7]
<span>adjacent angles

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2 years ago
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faltersainse [42]

Answer:

\frac{3}{2}

Step-by-step explanation:

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6 0
2 years ago
Read 2 more answers
If g(x)=x^2-5x+8, find g(8)
ycow [4]

Answer:

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5 0
2 years ago
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Furkat [3]

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Or

<span>r =  A/pt – 1/t</span>

3 0
3 years ago
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