Question

Given sinθ = 7 for some value of θ. Is it possible (or) not. Justify your answer. 5

Answer 1

Answer:

B=90

o

, AB=3,BC=4,AC=5

tanA=

3

4

>d. ...(AC

2

=AB

2

+BC

2

)

(ii) True

AC

2

=AB

2

+BC

2

(12x)

2

=(5x)

2

+BC

2

,

BC=

119x

(it is possible) Pythagoras theorem

(iii) False

cosA is cosine A, cscA is cosecant

(iv) False

cotA = cotangent of ∠A not product of cot and A.

(v) False

sinθ=

hypotenuse

perpendicular

sinθ>1;

3

4

>1 [∵ hypotenuse > base > perpendicular]

sinθ will always less than 1.