3 years ago

Prove thatsin 75-sin 15=cos 105+cos 15

Mathematics

2 answers:

Rzqust [24]3 years ago

6 0

Answer:

Step-by-step explanation

RHS = cos 105° + cos 15°

= cos (90° + 15°) + cos (90° – 75°)

= – sin 15° + sin 75°

= sin 75° – sin 15°

= LHS

BabaBlast [244]3 years ago

4 0

Answer:

Step-by-step explanation:

sin75-sin15

=sin (90-15)-(-cos (90+15))

=cos 15+cos 105

You might be interested in

Which expression is equivalent to 3 sqrt 27x^18

shusha [124]

Assuming your original expression was 3√(27x¹⁸), the answer is 9x⁹√(3).

We split up the radicand into perfect squares. Once we do, we take out the things that were squared:
$3\sqrt{27x^{18}} = 3\sqrt{3\times3\times3x^2x^2x^2x^2x^2x^2x^2x^2x^2x^2} = 3*3*xxxxxxxxx\sqrt{3}
$
$=9x^9\sqrt{3}$

6 0

3 years ago

Find the area of the sector.

makvit [3.9K]

Answer:

392*pi/3

Step-by-step explanation:

A = r²*angle *pi/ 360 = 14²*240*pi /360 divide by 10 to simplify

196 *24*pi/36 = 196*2*pi/ 3 = 392*pi/3

4 0

3 years ago

What is the mean plant height after 60 days

Ahat [919]

I need more information to answer that.

8 0

4 years ago

Read 2 more answers

The lengths of two sides of a triangle are shown.

goblinko [34]

Answer:

− 2 − 6 + 8

Step-by-step explanation:

6 0

3 years ago

Helppp please I don’t get it

timofeeve [1]

obviously 12 boys

and 18 girls

8 0

3 years ago

Prove thatsin 75-sin 15=cos 105+cos 15​

Prove thatsin 75-sin 15=cos 105+cos 15