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Sever21 [200]
3 years ago
11

1. Factorise the expressions.a2a2 + 2ad + 2ac - ab - bd - bc​

Mathematics
1 answer:
Ugo [173]3 years ago
6 0
There's the only answer i've got

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Prove these identities <br>(i) secx cosecx - cotx = tanx<br>​
brilliants [131]

Answer:

(A)\frac 1 {cosx} \frac 1 {sin x}  - \frac {cosx} {sin x} = \frac {sin x} {cosx} \\\\(B)\frac{1-cos^2 x }{cos x sin x} = \frac {sin x} {cosx} \\\\(C) \frac{(sin^2x + cos^2x)-cos^2 x }{cos x sin x} = \frac {sin x} {cosx} \\\\(D) \frac{sin^2x }{cos x sin x} = \frac {sin x} {cosx}\\\\(E)\frac {sin x}{cos x} = \frac {sin x}{cos x}

In step A, you replace all trigonometric functions with their definitions in terms of sine and cosine.

In step B, you add the two together as you add fractions.

In step C, you replace 1 with the sum of the squares of sine and cosine.
In step D, you add the cosine terms together so they disappear.

In step E, finally, you divide numerator and denominator by sin x.

3 0
2 years ago
Question 6
Tamiku [17]

Answer:

C.

Step-by-step explanation

shes pulling RANDOM names. key word random, hope this helped

8 0
3 years ago
Find the interest rate for ​$9000 deposit accumulating to ​$9889​, compounded annually for 5 years.
stellarik [79]

sorry I didn't answer the question

7 0
3 years ago
Help :( ik I asked a questions a few mins ago my brain just isn’t it today
ELEN [110]
I can’t see your scream is crack
7 0
3 years ago
Thereare 30 students in mr.holland's music class.if 30% of the students play in the school band,how many students in the class p
stiv31 [10]
9 students in the class play in the school band. 

30% of 30
Well, when doing a percentage you first turn the percentage into a decimal (move the % two units to the left). So 30% = 0.3

In math, the word of  means multiplication, so: 0.3 x 30 
Which equal 9. 

You can also turn the percentage into a fraction, it's really up to preference. 

30/100 of 30 = 3/10 of 30 = 3/10 x 30 = 3/10 x 30/1 = 9/1 or 9

6 0
3 years ago
Read 2 more answers
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