Question

Question 1
Given: In triangle ABC, angleB=90°.
If 15 cot A=8, Find sin A
and sec A.​

Answer 1

Step-by-step explanation:

15cotA=8

cotA=

15

8

=> tanA=

8

15

-------(tanA=

cotA

1

)

We know that,

tanθ=

adjacentSide

oppositeSide

Consider the attached figure, triangleABC

From Pythagoras theorem,

AC

2

=AB

2

+BC

2

AC

2

=8

2

+15

2

=64+225=289

AC=17

cosA=

Hypotenuse

adjacentSide

=

AC

AB

=

17

8

secA=

cosA

1

=

17

8

1

8

17

sinA=

Hypotenuse

oppositeSide

=

AC

BC

=

17

15

Answer 2

Step-by-step explanation:

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