Question

if cotA=3/4, find the value of cos²A-sin²A​

Answer 1

Answer:

sin doori - cos doori = tandoori

Step-by-step explanation:

ABCD is a parallelogram. X is the mid-point of AD and Y is

the mid-point of BC. Prove that XY and BD bisect each

other.

Answer 2

Answer:

-7/25

Step-by-step explanation:

cotA=3/4

sinA=4/5

cosA=3/5

cos²A-sin²A

=9/25-16/25

=-7/25

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