Question

from the following figure,find the value of:
I)cot²c-1/sin²c​

Answer 1

Answer:

here is answer

Step-by-step explanation:

let b is perpendicular to ac at p

then pc=✓12square-4square

pc=8✓2

now, cotsquare c = 8✓2 square/4 square

cotsquare c =128/16 =8

cotsquare c -1= 8-1

=7

sin square c = 4 square/12 square

sin square c = 16/144

sin square c = 1/9

now, cotsquare c-1/sin square c = 7divided by 1/9

=63