Math, asked by ayushikakde6, 7 months ago

if sin A=-5/13 ,π<A<3π and cosB = 3/2,3π/2<B<2π find Sina+b. cos a-b tan a+b​

Answers

Answered by bdsconsultantzone
1

Answer:

find in maths papa

Step-by-step explanation:

it is much Better

Answered by studyomaster
2

As

sin

A

is negative and is in

Q

3

,

cos

A

is negative and

cos

A

=

1

(

5

13

)

2

=

1

25

169

=

144

169

=

12

13

Further,

cos

B

is positive and is in

Q

4

,

sin

B

is negative and

sin

B

=

1

(

24

25

)

2

=

1

576

625

=

49

625

=

7

25

Hence

sin

(

A

+

B

)

=

sin

A

cos

B

×

cos

A

sin

B

=

5

13

×

24

25

+

(

12

13

)

×

(

7

25

)

=

120

325

+

84

325

=

36

325

hope this helps you

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