Question

solve this sum
class 10th maths CHAPTER -TRIGNOMATRY​

Answer 1

Answer:

See the above attachment for answer

Answer 2

Step-by-step explanation:

(1+sinA)(1-sinA)/(1+cosA)(1-cosA)=

1-sin^2A/1-cos^2A=cos^2A/sin^2A=cot^2A

since,...cotA=7/8

so value of expression is 49/64